./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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_test22_2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:43:35,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:43:35,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:43:35,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:43:35,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:43:35,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:43:35,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:43:35,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:43:35,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:43:35,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:43:35,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:43:35,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:43:35,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:43:35,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:43:35,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:43:35,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:43:35,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:43:35,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:43:35,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:43:35,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:43:35,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:43:35,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:43:35,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:43:35,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:43:35,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:43:35,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:43:35,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:43:35,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:43:35,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:43:35,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:43:35,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:43:35,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:43:35,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:43:35,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:43:35,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:43:35,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:43:35,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:43:35,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:43:35,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:43:35,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:43:35,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:43:35,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:43:35,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:43:35,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:43:35,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:43:35,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:43:35,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:43:35,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:43:35,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:43:35,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:43:35,606 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:43:35,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:43:35,607 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:43:35,607 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:43:35,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:43:35,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:43:35,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:43:35,608 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:43:35,608 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:43:35,608 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:43:35,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:43:35,608 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:43:35,609 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:43:35,609 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:43:35,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:43:35,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:43:35,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:43:35,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:43:35,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:43:35,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:43:35,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:43:35,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:43:35,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:43:35,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d [2021-12-14 19:43:35,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:43:35,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:43:35,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:43:35,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:43:35,865 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:43:35,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-14 19:43:35,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216420aff/8168ee622fbe4d3f9c7a0d10cdf8ba09/FLAGcd895b6cc [2021-12-14 19:43:36,407 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:43:36,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-14 19:43:36,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216420aff/8168ee622fbe4d3f9c7a0d10cdf8ba09/FLAGcd895b6cc [2021-12-14 19:43:36,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216420aff/8168ee622fbe4d3f9c7a0d10cdf8ba09 [2021-12-14 19:43:36,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:43:36,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:43:36,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:43:36,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:43:36,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:43:36,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:43:36" (1/1) ... [2021-12-14 19:43:36,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28558347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:36, skipping insertion in model container [2021-12-14 19:43:36,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:43:36" (1/1) ... [2021-12-14 19:43:36,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:43:36,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:43:36,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:43:36,824 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-14 19:43:36,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ae9b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:36, skipping insertion in model container [2021-12-14 19:43:36,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:43:36,825 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-14 19:43:36,827 INFO L158 Benchmark]: Toolchain (without parser) took 388.56ms. Allocated memory is still 104.9MB. Free memory was 72.2MB in the beginning and 78.2MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 19:43:36,827 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 86.0MB. Free memory was 43.2MB in the beginning and 43.2MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:43:36,828 INFO L158 Benchmark]: CACSL2BoogieTranslator took 386.45ms. Allocated memory is still 104.9MB. Free memory was 72.0MB in the beginning and 78.2MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 19:43:36,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 86.0MB. Free memory was 43.2MB in the beginning and 43.2MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 386.45ms. Allocated memory is still 104.9MB. Free memory was 72.0MB in the beginning and 78.2MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. 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 where the value type is smaller than the cast-to type 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_test22_2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:43:38,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:43:38,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:43:38,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:43:38,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:43:38,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:43:38,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:43:38,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:43:38,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:43:38,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:43:38,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:43:38,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:43:38,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:43:38,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:43:38,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:43:38,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:43:38,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:43:38,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:43:38,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:43:38,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:43:38,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:43:38,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:43:38,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:43:38,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:43:38,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:43:38,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:43:38,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:43:38,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:43:38,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:43:38,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:43:38,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:43:38,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:43:38,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:43:38,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:43:38,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:43:38,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:43:38,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:43:38,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:43:38,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:43:38,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:43:38,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:43:38,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-14 19:43:38,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:43:38,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:43:38,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:43:38,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:43:38,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:43:38,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:43:38,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:43:38,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:43:38,643 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:43:38,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:43:38,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:43:38,645 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:43:38,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:43:38,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:43:38,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:43:38,645 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:43:38,645 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:43:38,646 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:43:38,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:43:38,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:43:38,646 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 19:43:38,646 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 19:43:38,646 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:43:38,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:43:38,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:43:38,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:43:38,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:43:38,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:43:38,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:43:38,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:43:38,656 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 19:43:38,657 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 19:43:38,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:43:38,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 19:43:38,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d [2021-12-14 19:43:38,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:43:38,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:43:38,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:43:38,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:43:38,961 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:43:38,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-14 19:43:39,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02043f72f/9d901317ce14441b904e87c557970688/FLAG2057fa725 [2021-12-14 19:43:39,565 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:43:39,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-14 19:43:39,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02043f72f/9d901317ce14441b904e87c557970688/FLAG2057fa725 [2021-12-14 19:43:39,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02043f72f/9d901317ce14441b904e87c557970688 [2021-12-14 19:43:39,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:43:39,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:43:39,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:43:39,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:43:39,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:43:39,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:43:39" (1/1) ... [2021-12-14 19:43:39,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4f7bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:39, skipping insertion in model container [2021-12-14 19:43:39,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:43:39" (1/1) ... [2021-12-14 19:43:39,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:43:39,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:43:40,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:43:40,340 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-14 19:43:40,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:43:40,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:43:40,408 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:43:40,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:43:40,503 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:43:40,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40 WrapperNode [2021-12-14 19:43:40,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:43:40,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:43:40,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:43:40,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:43:40,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,583 INFO L137 Inliner]: procedures = 165, calls = 71, calls flagged for inlining = 23, calls inlined = 17, statements flattened = 120 [2021-12-14 19:43:40,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:43:40,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:43:40,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:43:40,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:43:40,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:43:40,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:43:40,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:43:40,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:43:40,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (1/1) ... [2021-12-14 19:43:40,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:43:40,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:43:40,680 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) [2021-12-14 19:43:40,700 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 [2021-12-14 19:43:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-14 19:43:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-14 19:43:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-14 19:43:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 19:43:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 19:43:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2021-12-14 19:43:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2021-12-14 19:43:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:43:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:43:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 19:43:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:43:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-14 19:43:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:43:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 19:43:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:43:40,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:43:40,840 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:43:40,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:43:41,166 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:43:41,172 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:43:41,172 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 19:43:41,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:43:41 BoogieIcfgContainer [2021-12-14 19:43:41,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:43:41,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:43:41,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:43:41,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:43:41,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:43:39" (1/3) ... [2021-12-14 19:43:41,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a0da41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:43:41, skipping insertion in model container [2021-12-14 19:43:41,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:40" (2/3) ... [2021-12-14 19:43:41,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a0da41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:43:41, skipping insertion in model container [2021-12-14 19:43:41,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:43:41" (3/3) ... [2021-12-14 19:43:41,183 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2-2.i [2021-12-14 19:43:41,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:43:41,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-14 19:43:41,232 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:43:41,243 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 19:43:41,244 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-14 19:43:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 83 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:43:41,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:41,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:41,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1790059245, now seen corresponding path program 1 times [2021-12-14 19:43:41,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34606522] [2021-12-14 19:43:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:41,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:41,282 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) [2021-12-14 19:43:41,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 19:43:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:43:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:41,489 INFO L388 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 [2021-12-14 19:43:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:41,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:41,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:41,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34606522] [2021-12-14 19:43:41,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34606522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:41,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:41,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:43:41,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819893722] [2021-12-14 19:43:41,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:41,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:43:41,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:43:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:43:41,561 INFO L87 Difference]: Start difference. First operand has 90 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 83 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-12-14 19:43:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:41,880 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-12-14 19:43:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:43:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2021-12-14 19:43:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:41,890 INFO L225 Difference]: With dead ends: 153 [2021-12-14 19:43:41,890 INFO L226 Difference]: Without dead ends: 151 [2021-12-14 19:43:41,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:43:41,895 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 94 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:41,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 373 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:43:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-14 19:43:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2021-12-14 19:43:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 85 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 19:43:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2021-12-14 19:43:41,930 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 10 [2021-12-14 19:43:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:41,931 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2021-12-14 19:43:41,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-12-14 19:43:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2021-12-14 19:43:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:43:41,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:41,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:41,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:42,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:42,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1761430094, now seen corresponding path program 1 times [2021-12-14 19:43:42,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:42,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046970976] [2021-12-14 19:43:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:42,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:42,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:42,144 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) [2021-12-14 19:43:42,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 19:43:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:43:42,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:42,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:42,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:42,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046970976] [2021-12-14 19:43:42,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046970976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:42,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:42,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:43:42,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920368013] [2021-12-14 19:43:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:42,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:43:42,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:43:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:43:42,284 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-12-14 19:43:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:42,304 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-12-14 19:43:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:43:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2021-12-14 19:43:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:42,306 INFO L225 Difference]: With dead ends: 110 [2021-12-14 19:43:42,306 INFO L226 Difference]: Without dead ends: 110 [2021-12-14 19:43:42,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:43:42,307 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 17 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:42,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 386 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-14 19:43:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-12-14 19:43:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 83 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 19:43:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-14 19:43:42,316 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 10 [2021-12-14 19:43:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:42,316 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-14 19:43:42,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-12-14 19:43:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-14 19:43:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:43:42,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:42,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:42,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:42,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:42,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash 342738302, now seen corresponding path program 1 times [2021-12-14 19:43:42,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:42,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994978799] [2021-12-14 19:43:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:42,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:42,529 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) [2021-12-14 19:43:42,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 19:43:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:42,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:43:42,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:42,621 INFO L388 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 [2021-12-14 19:43:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:42,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:42,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994978799] [2021-12-14 19:43:42,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994978799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:42,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:42,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:43:42,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257846593] [2021-12-14 19:43:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:42,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:43:42,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:43:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:43:42,719 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-12-14 19:43:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:43,106 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-12-14 19:43:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:43:43,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2021-12-14 19:43:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:43,110 INFO L225 Difference]: With dead ends: 128 [2021-12-14 19:43:43,110 INFO L226 Difference]: Without dead ends: 128 [2021-12-14 19:43:43,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:43,112 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 69 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:43,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 465 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:43:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-14 19:43:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2021-12-14 19:43:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 82 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 19:43:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-14 19:43:43,124 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 11 [2021-12-14 19:43:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:43,124 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-14 19:43:43,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-12-14 19:43:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-14 19:43:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:43:43,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:43,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:43,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:43,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:43,326 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2034926041, now seen corresponding path program 1 times [2021-12-14 19:43:43,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:43,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225543628] [2021-12-14 19:43:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:43,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:43,329 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) [2021-12-14 19:43:43,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 19:43:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:43:43,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:43,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:43,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225543628] [2021-12-14 19:43:43,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225543628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:43,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:43,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:43:43,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713731345] [2021-12-14 19:43:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:43,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:43:43,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:43:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:43:43,421 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-14 19:43:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:43,440 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-12-14 19:43:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:43:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-12-14 19:43:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:43,444 INFO L225 Difference]: With dead ends: 109 [2021-12-14 19:43:43,444 INFO L226 Difference]: Without dead ends: 109 [2021-12-14 19:43:43,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:43:43,446 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 33 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:43,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 410 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-14 19:43:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2021-12-14 19:43:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 82 states have internal predecessors, (89), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 19:43:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-12-14 19:43:43,463 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 12 [2021-12-14 19:43:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:43,464 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-12-14 19:43:43,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-14 19:43:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-12-14 19:43:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:43:43,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:43,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:43,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:43,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:43,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash -517230920, now seen corresponding path program 1 times [2021-12-14 19:43:43,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:43,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375597140] [2021-12-14 19:43:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:43,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:43,682 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) [2021-12-14 19:43:43,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 19:43:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:43:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:43,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:43,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375597140] [2021-12-14 19:43:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375597140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:43,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:43,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:43:43,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361051848] [2021-12-14 19:43:43,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:43:43,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:43:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:43:43,789 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-14 19:43:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:43,822 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-12-14 19:43:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:43:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-12-14 19:43:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:43,824 INFO L225 Difference]: With dead ends: 106 [2021-12-14 19:43:43,824 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 19:43:43,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:43:43,834 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 15 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:43,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 281 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 19:43:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2021-12-14 19:43:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 84 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 19:43:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-12-14 19:43:43,853 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 12 [2021-12-14 19:43:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:43,853 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-12-14 19:43:43,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-14 19:43:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-12-14 19:43:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:43:43,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:43,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:43,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-14 19:43:44,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:44,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1400250303, now seen corresponding path program 1 times [2021-12-14 19:43:44,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:44,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684933859] [2021-12-14 19:43:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:44,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:44,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:43:44,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 19:43:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:43:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:44,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:44,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684933859] [2021-12-14 19:43:44,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684933859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:44,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:44,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:43:44,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447891224] [2021-12-14 19:43:44,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:43:44,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:43:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:43:44,179 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:44,202 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-12-14 19:43:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:43:44,203 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), 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 16 [2021-12-14 19:43:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:44,204 INFO L225 Difference]: With dead ends: 100 [2021-12-14 19:43:44,205 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 19:43:44,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:43:44,207 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 31 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:44,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 200 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 19:43:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-12-14 19:43:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 85 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 19:43:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-12-14 19:43:44,215 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 16 [2021-12-14 19:43:44,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:44,215 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-12-14 19:43:44,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-12-14 19:43:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:43:44,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:44,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:44,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:44,417 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1200886583, now seen corresponding path program 1 times [2021-12-14 19:43:44,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:44,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586398499] [2021-12-14 19:43:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:44,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:44,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:44,420 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) [2021-12-14 19:43:44,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 19:43:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:43:44,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:44,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:44,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586398499] [2021-12-14 19:43:44,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586398499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:44,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:44,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:43:44,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151640658] [2021-12-14 19:43:44,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:44,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:43:44,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:43:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:43:44,554 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:44,608 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-12-14 19:43:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:43:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-14 19:43:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:44,610 INFO L225 Difference]: With dead ends: 106 [2021-12-14 19:43:44,610 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 19:43:44,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:43:44,611 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 14 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:44,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 454 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 19:43:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-12-14 19:43:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 91 states have internal predecessors, (97), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-14 19:43:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-12-14 19:43:44,616 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 17 [2021-12-14 19:43:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:44,617 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-12-14 19:43:44,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-12-14 19:43:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:43:44,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:44,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:44,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:44,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:44,826 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash -517345560, now seen corresponding path program 1 times [2021-12-14 19:43:44,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689407929] [2021-12-14 19:43:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:44,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:44,828 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) [2021-12-14 19:43:44,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 19:43:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:44,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:43:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:44,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:43:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:45,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:45,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689407929] [2021-12-14 19:43:45,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689407929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:43:45,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:43:45,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-14 19:43:45,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171124989] [2021-12-14 19:43:45,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:43:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:43:45,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:45,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:43:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:43:45,007 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-14 19:43:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:45,072 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2021-12-14 19:43:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:43:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-14 19:43:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:45,073 INFO L225 Difference]: With dead ends: 107 [2021-12-14 19:43:45,073 INFO L226 Difference]: Without dead ends: 107 [2021-12-14 19:43:45,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:43:45,074 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 62 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:45,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 465 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-14 19:43:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-12-14 19:43:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 94 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-14 19:43:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-12-14 19:43:45,082 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 17 [2021-12-14 19:43:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:45,083 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-12-14 19:43:45,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-14 19:43:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-12-14 19:43:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:43:45,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:45,084 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:45,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-14 19:43:45,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:45,293 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -613690879, now seen corresponding path program 2 times [2021-12-14 19:43:45,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480540404] [2021-12-14 19:43:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:43:45,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:45,295 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) [2021-12-14 19:43:45,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 19:43:45,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:43:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:43:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:43:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:45,376 INFO L388 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 [2021-12-14 19:43:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:43:45,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:45,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480540404] [2021-12-14 19:43:45,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480540404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:45,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:45,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:43:45,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433506532] [2021-12-14 19:43:45,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:45,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:43:45,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:45,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:43:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:43:45,461 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-14 19:43:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:45,797 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-14 19:43:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:43:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 20 [2021-12-14 19:43:45,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:45,798 INFO L225 Difference]: With dead ends: 136 [2021-12-14 19:43:45,798 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 19:43:45,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:43:45,799 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 91 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:45,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 511 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:43:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 19:43:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-12-14 19:43:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 93 states have internal predecessors, (99), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-14 19:43:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-12-14 19:43:45,804 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 20 [2021-12-14 19:43:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:45,804 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-12-14 19:43:45,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-14 19:43:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-12-14 19:43:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:43:45,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:45,805 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:45,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:46,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:46,013 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash -613690878, now seen corresponding path program 1 times [2021-12-14 19:43:46,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:46,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058397839] [2021-12-14 19:43:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:46,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:46,015 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) [2021-12-14 19:43:46,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 19:43:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:46,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:43:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:46,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:43:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:46,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058397839] [2021-12-14 19:43:46,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058397839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:43:46,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:43:46,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-14 19:43:46,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469679026] [2021-12-14 19:43:46,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:43:46,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:43:46,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:43:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:43:46,350 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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) [2021-12-14 19:43:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:46,553 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-12-14 19:43:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:43:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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 20 [2021-12-14 19:43:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:46,555 INFO L225 Difference]: With dead ends: 112 [2021-12-14 19:43:46,555 INFO L226 Difference]: Without dead ends: 112 [2021-12-14 19:43:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:43:46,556 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 30 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:46,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 918 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:43:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-14 19:43:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-14 19:43:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.381578947368421) internal successors, (105), 99 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-14 19:43:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-12-14 19:43:46,560 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 20 [2021-12-14 19:43:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:46,560 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-12-14 19:43:46,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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) [2021-12-14 19:43:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-12-14 19:43:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:43:46,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:46,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:46,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:46,770 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -694582635, now seen corresponding path program 1 times [2021-12-14 19:43:46,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:46,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563502199] [2021-12-14 19:43:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:46,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:46,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:46,772 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) [2021-12-14 19:43:46,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-14 19:43:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:43:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:43:46,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:46,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:46,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563502199] [2021-12-14 19:43:46,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563502199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:46,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:46,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:43:46,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440896549] [2021-12-14 19:43:46,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:46,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:43:46,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:43:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:43:46,888 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 19:43:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:46,978 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-12-14 19:43:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:43:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-12-14 19:43:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:46,980 INFO L225 Difference]: With dead ends: 115 [2021-12-14 19:43:46,980 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 19:43:46,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:43:46,981 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 31 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:46,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 182 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:43:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 19:43:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-12-14 19:43:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 88 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-12-14 19:43:46,984 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 25 [2021-12-14 19:43:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:46,985 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-12-14 19:43:46,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 19:43:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-12-14 19:43:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 19:43:46,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:46,986 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:46,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:47,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:47,194 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1800263842, now seen corresponding path program 2 times [2021-12-14 19:43:47,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:47,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960514866] [2021-12-14 19:43:47,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:43:47,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:47,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:47,196 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) [2021-12-14 19:43:47,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-14 19:43:47,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:43:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:43:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 19:43:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:47,290 INFO L388 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 [2021-12-14 19:43:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-14 19:43:47,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:47,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:47,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960514866] [2021-12-14 19:43:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960514866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:47,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:47,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:43:47,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31177438] [2021-12-14 19:43:47,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:47,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:43:47,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:43:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:47,485 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-12-14 19:43:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:47,910 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2021-12-14 19:43:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:43:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 26 [2021-12-14 19:43:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:47,911 INFO L225 Difference]: With dead ends: 135 [2021-12-14 19:43:47,911 INFO L226 Difference]: Without dead ends: 135 [2021-12-14 19:43:47,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:43:47,912 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 97 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:47,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 591 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:43:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-14 19:43:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2021-12-14 19:43:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-12-14 19:43:47,915 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 26 [2021-12-14 19:43:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:47,916 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-12-14 19:43:47,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-12-14 19:43:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-12-14 19:43:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 19:43:47,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:47,916 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:47,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:48,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:48,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash -819776159, now seen corresponding path program 1 times [2021-12-14 19:43:48,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073759859] [2021-12-14 19:43:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:48,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:48,127 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:43:48,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-14 19:43:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:43:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:48,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:43:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:43:48,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073759859] [2021-12-14 19:43:48,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073759859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:43:48,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:43:48,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-14 19:43:48,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154629201] [2021-12-14 19:43:48,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:43:48,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 19:43:48,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:48,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 19:43:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-12-14 19:43:48,851 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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) [2021-12-14 19:43:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:49,239 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-12-14 19:43:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:43:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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 28 [2021-12-14 19:43:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:49,240 INFO L225 Difference]: With dead ends: 100 [2021-12-14 19:43:49,240 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 19:43:49,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:43:49,241 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 29 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:49,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1126 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:43:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 19:43:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-12-14 19:43:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.375) internal successors, (99), 93 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-12-14 19:43:49,245 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 28 [2021-12-14 19:43:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-12-14 19:43:49,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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) [2021-12-14 19:43:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-12-14 19:43:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 19:43:49,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:49,246 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:49,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:49,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:49,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1570464767, now seen corresponding path program 2 times [2021-12-14 19:43:49,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219224730] [2021-12-14 19:43:49,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:43:49,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:49,460 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) [2021-12-14 19:43:49,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-14 19:43:49,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:43:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:43:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:43:49,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:49,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:49,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:49,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219224730] [2021-12-14 19:43:49,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219224730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:49,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:49,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:43:49,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464811483] [2021-12-14 19:43:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:49,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:43:49,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:43:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:43:49,622 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-14 19:43:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:49,654 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-12-14 19:43:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:43:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 34 [2021-12-14 19:43:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:49,656 INFO L225 Difference]: With dead ends: 100 [2021-12-14 19:43:49,656 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 19:43:49,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:43:49,658 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 49 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:49,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 366 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 19:43:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-12-14 19:43:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 93 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2021-12-14 19:43:49,661 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 34 [2021-12-14 19:43:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:49,662 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2021-12-14 19:43:49,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-14 19:43:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2021-12-14 19:43:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 19:43:49,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:49,665 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:49,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:49,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:49,874 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash -234355352, now seen corresponding path program 1 times [2021-12-14 19:43:49,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628714904] [2021-12-14 19:43:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:49,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:49,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:43:49,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-14 19:43:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:43:50,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:50,042 INFO L388 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 [2021-12-14 19:43:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:50,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:50,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628714904] [2021-12-14 19:43:50,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628714904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:50,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:50,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:43:50,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773791101] [2021-12-14 19:43:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:50,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:43:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:43:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:50,157 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:50,400 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-12-14 19:43:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:43:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-14 19:43:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:50,402 INFO L225 Difference]: With dead ends: 98 [2021-12-14 19:43:50,402 INFO L226 Difference]: Without dead ends: 98 [2021-12-14 19:43:50,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:43:50,402 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 74 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:50,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 378 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:43:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-14 19:43:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-14 19:43:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 91 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-12-14 19:43:50,405 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 36 [2021-12-14 19:43:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:50,405 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-12-14 19:43:50,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-12-14 19:43:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 19:43:50,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:50,406 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:50,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-14 19:43:50,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:50,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash -234355351, now seen corresponding path program 1 times [2021-12-14 19:43:50,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652678007] [2021-12-14 19:43:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:50,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:50,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:50,609 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) [2021-12-14 19:43:50,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-14 19:43:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 19:43:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:50,782 INFO L388 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 [2021-12-14 19:43:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:51,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:51,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:51,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652678007] [2021-12-14 19:43:51,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652678007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:51,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:51,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:43:51,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904409141] [2021-12-14 19:43:51,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:51,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:43:51,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:51,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:43:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:43:51,032 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:51,347 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-12-14 19:43:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:43:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-14 19:43:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:51,349 INFO L225 Difference]: With dead ends: 96 [2021-12-14 19:43:51,349 INFO L226 Difference]: Without dead ends: 96 [2021-12-14 19:43:51,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:43:51,350 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 78 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:51,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 461 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:43:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-14 19:43:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-14 19:43:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 89 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-12-14 19:43:51,352 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 36 [2021-12-14 19:43:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:51,353 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-12-14 19:43:51,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:43:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-12-14 19:43:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 19:43:51,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:51,354 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:51,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:51,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:51,562 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash -285061459, now seen corresponding path program 1 times [2021-12-14 19:43:51,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:51,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138515114] [2021-12-14 19:43:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:51,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:51,564 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) [2021-12-14 19:43:51,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-14 19:43:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:43:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:51,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:51,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:51,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138515114] [2021-12-14 19:43:51,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138515114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:51,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:51,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:43:51,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562716145] [2021-12-14 19:43:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:51,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:43:51,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:43:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:43:51,794 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-14 19:43:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:51,837 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-12-14 19:43:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:43:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 36 [2021-12-14 19:43:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:51,838 INFO L225 Difference]: With dead ends: 96 [2021-12-14 19:43:51,838 INFO L226 Difference]: Without dead ends: 96 [2021-12-14 19:43:51,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:51,839 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 69 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:51,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 396 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-14 19:43:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-14 19:43:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 88 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-12-14 19:43:51,842 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 36 [2021-12-14 19:43:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:51,842 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-12-14 19:43:51,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-14 19:43:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-12-14 19:43:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 19:43:51,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:51,842 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:51,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:52,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:52,052 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1910239882, now seen corresponding path program 1 times [2021-12-14 19:43:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:52,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053526402] [2021-12-14 19:43:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:52,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:52,054 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) [2021-12-14 19:43:52,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-14 19:43:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:43:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:52,240 INFO L388 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 [2021-12-14 19:43:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:52,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:52,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:52,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053526402] [2021-12-14 19:43:52,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053526402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:52,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:52,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:43:52,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788901491] [2021-12-14 19:43:52,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:52,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:43:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:43:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:52,384 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-12-14 19:43:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:52,623 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-12-14 19:43:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:43:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 44 [2021-12-14 19:43:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:52,624 INFO L225 Difference]: With dead ends: 97 [2021-12-14 19:43:52,624 INFO L226 Difference]: Without dead ends: 97 [2021-12-14 19:43:52,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:43:52,625 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 61 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 366 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2021-12-14 19:43:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-14 19:43:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-12-14 19:43:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-12-14 19:43:52,628 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-12-14 19:43:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:52,628 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-12-14 19:43:52,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-12-14 19:43:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-12-14 19:43:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 19:43:52,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:52,629 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:52,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:52,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:52,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1910239883, now seen corresponding path program 1 times [2021-12-14 19:43:52,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875143628] [2021-12-14 19:43:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:52,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:52,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:52,837 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) [2021-12-14 19:43:52,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-14 19:43:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:53,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 19:43:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:53,035 INFO L388 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 [2021-12-14 19:43:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:53,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:53,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:53,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875143628] [2021-12-14 19:43:53,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875143628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:53,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:53,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:43:53,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341107837] [2021-12-14 19:43:53,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:53,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:43:53,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:43:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:43:53,303 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-12-14 19:43:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:53,550 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-12-14 19:43:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:43:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 44 [2021-12-14 19:43:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:53,556 INFO L225 Difference]: With dead ends: 99 [2021-12-14 19:43:53,556 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 19:43:53,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:43:53,557 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 64 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:53,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 349 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 130 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-12-14 19:43:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 19:43:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2021-12-14 19:43:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 84 states have internal predecessors, (89), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-12-14 19:43:53,560 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 44 [2021-12-14 19:43:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:53,560 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-12-14 19:43:53,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-12-14 19:43:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-12-14 19:43:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 19:43:53,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:53,561 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:53,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:53,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:53,762 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1609523877, now seen corresponding path program 1 times [2021-12-14 19:43:53,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713061089] [2021-12-14 19:43:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:53,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:53,764 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) [2021-12-14 19:43:53,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-14 19:43:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:43:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:54,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:54,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713061089] [2021-12-14 19:43:54,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713061089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:54,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:54,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:43:54,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922540096] [2021-12-14 19:43:54,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:54,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:43:54,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:43:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:43:54,047 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:54,088 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-12-14 19:43:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:43:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-14 19:43:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:54,089 INFO L225 Difference]: With dead ends: 92 [2021-12-14 19:43:54,089 INFO L226 Difference]: Without dead ends: 92 [2021-12-14 19:43:54,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:54,090 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:54,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 389 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:43:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-14 19:43:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-14 19:43:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 84 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:43:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-14 19:43:54,094 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 49 [2021-12-14 19:43:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-14 19:43:54,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-14 19:43:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 19:43:54,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:54,095 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:54,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:54,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:54,307 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1068375809, now seen corresponding path program 1 times [2021-12-14 19:43:54,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:54,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220605721] [2021-12-14 19:43:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:54,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:54,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:54,309 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) [2021-12-14 19:43:54,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-14 19:43:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:43:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:54,546 INFO L388 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 [2021-12-14 19:43:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:54,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:54,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:54,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220605721] [2021-12-14 19:43:54,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220605721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:54,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:54,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 19:43:54,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108610523] [2021-12-14 19:43:54,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:54,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:43:54,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:43:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:43:54,756 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:55,039 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-12-14 19:43:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:43:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2021-12-14 19:43:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:55,040 INFO L225 Difference]: With dead ends: 122 [2021-12-14 19:43:55,041 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 19:43:55,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:43:55,041 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 174 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:55,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 312 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2021-12-14 19:43:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 19:43:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2021-12-14 19:43:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 98 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 19:43:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2021-12-14 19:43:55,046 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 55 [2021-12-14 19:43:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:55,046 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2021-12-14 19:43:55,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2021-12-14 19:43:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 19:43:55,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:55,047 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:55,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:55,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:55,260 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_kobject_putErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1068375808, now seen corresponding path program 1 times [2021-12-14 19:43:55,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:55,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044014004] [2021-12-14 19:43:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:55,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:55,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:55,262 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) [2021-12-14 19:43:55,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-14 19:43:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-14 19:43:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:55,494 INFO L388 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 [2021-12-14 19:43:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:55,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:55,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:55,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044014004] [2021-12-14 19:43:55,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044014004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:55,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:55,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:43:55,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258969468] [2021-12-14 19:43:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:55,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:43:55,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:43:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:43:55,834 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:56,153 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2021-12-14 19:43:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:43:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2021-12-14 19:43:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:56,155 INFO L225 Difference]: With dead ends: 109 [2021-12-14 19:43:56,155 INFO L226 Difference]: Without dead ends: 109 [2021-12-14 19:43:56,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:43:56,156 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 152 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:56,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 379 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 203 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2021-12-14 19:43:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-14 19:43:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-12-14 19:43:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 96 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 19:43:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-12-14 19:43:56,159 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 55 [2021-12-14 19:43:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:56,160 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-12-14 19:43:56,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-12-14 19:43:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 19:43:56,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:56,167 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:56,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:56,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:56,379 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 7191578, now seen corresponding path program 1 times [2021-12-14 19:43:56,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:56,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136768053] [2021-12-14 19:43:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:56,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:56,381 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:43:56,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-14 19:43:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:56,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:43:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:56,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:56,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136768053] [2021-12-14 19:43:56,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136768053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:56,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:43:56,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800954014] [2021-12-14 19:43:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:56,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:43:56,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:43:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:43:56,742 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 19:43:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:56,818 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-12-14 19:43:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:43:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-12-14 19:43:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:56,819 INFO L225 Difference]: With dead ends: 109 [2021-12-14 19:43:56,819 INFO L226 Difference]: Without dead ends: 105 [2021-12-14 19:43:56,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:43:56,820 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 62 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:56,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 456 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:43:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-14 19:43:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-14 19:43:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 96 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 19:43:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-14 19:43:56,823 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 60 [2021-12-14 19:43:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:56,823 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-14 19:43:56,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 19:43:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-14 19:43:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 19:43:56,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:56,824 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:56,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-14 19:43:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:57,036 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 392980163, now seen corresponding path program 1 times [2021-12-14 19:43:57,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:57,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528706085] [2021-12-14 19:43:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:57,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:57,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:57,038 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) [2021-12-14 19:43:57,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-14 19:43:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:57,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 19:43:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:57,385 INFO L388 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 [2021-12-14 19:43:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:57,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:57,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:57,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528706085] [2021-12-14 19:43:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528706085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:57,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:57,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:43:57,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146336139] [2021-12-14 19:43:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:43:57,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:43:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:43:57,566 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:57,833 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-14 19:43:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:43:57,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2021-12-14 19:43:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:57,834 INFO L225 Difference]: With dead ends: 112 [2021-12-14 19:43:57,834 INFO L226 Difference]: Without dead ends: 112 [2021-12-14 19:43:57,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:43:57,835 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 110 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:57,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 326 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2021-12-14 19:43:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-14 19:43:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2021-12-14 19:43:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 96 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 19:43:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-12-14 19:43:57,838 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 61 [2021-12-14 19:43:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:57,838 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-12-14 19:43:57,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-12-14 19:43:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 19:43:57,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:57,839 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:57,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-14 19:43:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:58,043 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 392980164, now seen corresponding path program 1 times [2021-12-14 19:43:58,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542226648] [2021-12-14 19:43:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:58,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:58,045 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:43:58,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-14 19:43:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 19:43:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:43:58,384 INFO L388 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 [2021-12-14 19:43:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:43:58,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:43:58,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:43:58,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542226648] [2021-12-14 19:43:58,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542226648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:43:58,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:43:58,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 19:43:58,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578680494] [2021-12-14 19:43:58,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:43:58,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:43:58,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:43:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:43:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:43:58,748 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:43:59,135 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-12-14 19:43:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:43:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2021-12-14 19:43:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:43:59,137 INFO L225 Difference]: With dead ends: 103 [2021-12-14 19:43:59,137 INFO L226 Difference]: Without dead ends: 103 [2021-12-14 19:43:59,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:43:59,137 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 146 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:43:59,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 379 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2021-12-14 19:43:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-14 19:43:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-14 19:43:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 94 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 19:43:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-12-14 19:43:59,141 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 61 [2021-12-14 19:43:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:43:59,141 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-12-14 19:43:59,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:43:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-12-14 19:43:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 19:43:59,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:43:59,142 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:43:59,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-14 19:43:59,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:43:59,347 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_kobject_putErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:43:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:43:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash -808735445, now seen corresponding path program 1 times [2021-12-14 19:43:59,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:43:59,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78974809] [2021-12-14 19:43:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:43:59,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:43:59,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:43:59,349 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:43:59,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-14 19:43:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:43:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 19:43:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:44:00,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:00,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:00,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78974809] [2021-12-14 19:44:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78974809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:00,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:44:00,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722083796] [2021-12-14 19:44:00,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:00,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:44:00,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:44:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:44:00,091 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:00,406 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-12-14 19:44:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:44:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2021-12-14 19:44:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:00,407 INFO L225 Difference]: With dead ends: 102 [2021-12-14 19:44:00,407 INFO L226 Difference]: Without dead ends: 102 [2021-12-14 19:44:00,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:44:00,408 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 157 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:00,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 383 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 185 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2021-12-14 19:44:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-14 19:44:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-14 19:44:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.103448275862069) internal successors, (96), 93 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 19:44:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-12-14 19:44:00,411 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 64 [2021-12-14 19:44:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:00,412 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-12-14 19:44:00,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-12-14 19:44:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 19:44:00,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:00,413 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:00,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:00,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:00,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:44:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1477848750, now seen corresponding path program 1 times [2021-12-14 19:44:00,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740714945] [2021-12-14 19:44:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:00,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:00,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:00,621 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) [2021-12-14 19:44:00,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-14 19:44:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 19:44:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:00,899 INFO L388 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 [2021-12-14 19:44:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:44:01,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:44:01,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740714945] [2021-12-14 19:44:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740714945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:01,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:01,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-12-14 19:44:01,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649878124] [2021-12-14 19:44:01,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:01,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:44:01,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:44:01,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:44:01,410 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 19:44:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:01,724 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-12-14 19:44:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:44:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2021-12-14 19:44:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:01,726 INFO L225 Difference]: With dead ends: 128 [2021-12-14 19:44:01,726 INFO L226 Difference]: Without dead ends: 128 [2021-12-14 19:44:01,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-14 19:44:01,727 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 152 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:01,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 385 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-14 19:44:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-14 19:44:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-12-14 19:44:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 104 states have internal predecessors, (108), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-14 19:44:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2021-12-14 19:44:01,731 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 68 [2021-12-14 19:44:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:01,731 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2021-12-14 19:44:01,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 19:44:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2021-12-14 19:44:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 19:44:01,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:01,732 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:01,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-14 19:44:01,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:01,943 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:44:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1729031655, now seen corresponding path program 1 times [2021-12-14 19:44:01,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:01,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282453186] [2021-12-14 19:44:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:01,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:01,945 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) [2021-12-14 19:44:01,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-14 19:44:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-14 19:44:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:02,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 38 [2021-12-14 19:44:05,672 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2206 (_ BitVec 8)) (v_ArrVal_2208 (_ BitVec 8))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_2206) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_2208)))) is different from true [2021-12-14 19:44:05,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:05,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:05,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:05,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 32 [2021-12-14 19:44:06,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:06,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:06,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:44:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-12-14 19:44:06,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:44:06,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 23 [2021-12-14 19:44:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:44:06,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:06,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282453186] [2021-12-14 19:44:06,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282453186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:06,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:06,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-12-14 19:44:06,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004725029] [2021-12-14 19:44:06,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:06,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 19:44:06,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 19:44:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=591, Unknown=2, NotChecked=48, Total=702 [2021-12-14 19:44:06,480 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:07,262 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-12-14 19:44:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 19:44:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2021-12-14 19:44:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:07,264 INFO L225 Difference]: With dead ends: 100 [2021-12-14 19:44:07,265 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 19:44:07,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=134, Invalid=1128, Unknown=2, NotChecked=68, Total=1332 [2021-12-14 19:44:07,266 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 35 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:07,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 965 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 240 Invalid, 0 Unknown, 307 Unchecked, 0.4s Time] [2021-12-14 19:44:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 19:44:07,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-12-14 19:44:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 87 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:44:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-14 19:44:07,269 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 67 [2021-12-14 19:44:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-14 19:44:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-14 19:44:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 19:44:07,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:07,270 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:07,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:07,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:07,483 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:44:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1342862122, now seen corresponding path program 1 times [2021-12-14 19:44:07,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:07,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498338148] [2021-12-14 19:44:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:07,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:07,485 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) [2021-12-14 19:44:07,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-14 19:44:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:44:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:07,878 INFO L388 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 [2021-12-14 19:44:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:44:08,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-14 19:44:08,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:08,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498338148] [2021-12-14 19:44:08,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498338148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:08,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:08,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-12-14 19:44:08,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019405114] [2021-12-14 19:44:08,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:08,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:44:08,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:44:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:44:08,402 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 14 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 19:44:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:08,749 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-14 19:44:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:44:08,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 74 [2021-12-14 19:44:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:08,750 INFO L225 Difference]: With dead ends: 102 [2021-12-14 19:44:08,750 INFO L226 Difference]: Without dead ends: 102 [2021-12-14 19:44:08,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:44:08,751 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:08,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 414 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 241 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2021-12-14 19:44:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-14 19:44:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-12-14 19:44:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.072289156626506) internal successors, (89), 86 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:44:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-12-14 19:44:08,754 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 74 [2021-12-14 19:44:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:08,754 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-12-14 19:44:08,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 19:44:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-12-14 19:44:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 19:44:08,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:08,755 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:08,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-14 19:44:08,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:08,970 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-14 19:44:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1943196067, now seen corresponding path program 1 times [2021-12-14 19:44:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:08,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446107362] [2021-12-14 19:44:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:08,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:08,971 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:08,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-14 19:44:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-14 19:44:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:09,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:09,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:09,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 41 [2021-12-14 19:44:13,366 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2561 (_ BitVec 8)) (v_ArrVal_2564 (_ BitVec 8))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_2561) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_2564)))) is different from true [2021-12-14 19:44:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:44:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 71 [2021-12-14 19:44:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:13,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:13,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:13,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:44:13,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 193 treesize of output 165 [2021-12-14 19:44:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:14,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:14,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:44:14,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 137 [2021-12-14 19:44:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-14 19:44:18,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:42,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:42,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446107362] [2021-12-14 19:44:42,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446107362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:44:42,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1748398118] [2021-12-14 19:44:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:42,913 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-14 19:44:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-14 19:44:42,915 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-14 19:44:42,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-14 19:44:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-14 19:44:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:44:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:46,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:44:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 41