./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 e19ca921 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-dev-e19ca92 [2021-12-22 16:37:43,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:37:43,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:37:43,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:37:43,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:37:43,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:37:43,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:37:43,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:37:43,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:37:43,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:37:43,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:37:43,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:37:43,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:37:43,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:37:43,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:37:43,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:37:43,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:37:43,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:37:43,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:37:43,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:37:43,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:37:43,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:37:43,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:37:43,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:37:43,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:37:43,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:37:43,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:37:43,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:37:43,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:37:43,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:37:43,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:37:43,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:37:43,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:37:43,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:37:43,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:37:43,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:37:43,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:37:43,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:37:43,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:37:43,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:37:43,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:37:43,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:37:43,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:37:43,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:37:43,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:37:43,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:37:43,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:37:43,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:37:43,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:37:43,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:37:43,578 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:37:43,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:37:43,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:37:43,579 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:37:43,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:37:43,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:37:43,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:37:43,580 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:37:43,580 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:37:43,580 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:37:43,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:37:43,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:37:43,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:37:43,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:37:43,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:37:43,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:37:43,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:37:43,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:37:43,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:37:43,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:37:43,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:37:43,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:37:43,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:37:43,583 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d [2021-12-22 16:37:43,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:37:43,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:37:43,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:37:43,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:37:43,812 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:37:43,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-22 16:37:43,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f036046a4/f3df284bc9fc4acc8dd06de12f13008e/FLAGcee7eb766 [2021-12-22 16:37:44,301 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:37:44,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-22 16:37:44,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f036046a4/f3df284bc9fc4acc8dd06de12f13008e/FLAGcee7eb766 [2021-12-22 16:37:44,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f036046a4/f3df284bc9fc4acc8dd06de12f13008e [2021-12-22 16:37:44,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:37:44,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:37:44,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:37:44,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:37:44,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:37:44,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:37:44" (1/1) ... [2021-12-22 16:37:44,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da52e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:44, skipping insertion in model container [2021-12-22 16:37:44,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:37:44" (1/1) ... [2021-12-22 16:37:44,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:37:44,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:37:44,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:37:44,908 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) [2021-12-22 16:37:44,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ad2711d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:44, skipping insertion in model container [2021-12-22 16:37:44,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:37:44,910 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 16:37:44,911 INFO L158 Benchmark]: Toolchain (without parser) took 562.22ms. Allocated memory is still 86.0MB. Free memory was 54.3MB in the beginning and 58.6MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:37:44,912 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory was 42.9MB in the beginning and 42.8MB in the end (delta: 39.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:37:44,913 INFO L158 Benchmark]: CACSL2BoogieTranslator took 560.16ms. Allocated memory is still 86.0MB. Free memory was 54.2MB in the beginning and 58.6MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:37:44,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory was 42.9MB in the beginning and 42.8MB in the end (delta: 39.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 560.16ms. Allocated memory is still 86.0MB. Free memory was 54.2MB in the beginning and 58.6MB in the end (delta: -4.4MB). 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-dev-e19ca92 [2021-12-22 16:37:46,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:37:46,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:37:46,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:37:46,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:37:46,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:37:46,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:37:46,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:37:46,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:37:46,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:37:46,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:37:46,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:37:46,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:37:46,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:37:46,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:37:46,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:37:46,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:37:46,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:37:46,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:37:46,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:37:46,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:37:46,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:37:46,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:37:46,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:37:46,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:37:46,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:37:46,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:37:46,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:37:46,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:37:46,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:37:46,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:37:46,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:37:46,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:37:46,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:37:46,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:37:46,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:37:46,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:37:46,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:37:46,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:37:46,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:37:46,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:37:46,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 16:37:46,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:37:46,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:37:46,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:37:46,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:37:46,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:37:46,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:37:46,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:37:46,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:37:46,643 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:37:46,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:37:46,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:37:46,643 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:37:46,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:37:46,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:37:46,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:37:46,644 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:37:46,644 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:37:46,644 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:37:46,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:37:46,645 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:37:46,645 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 16:37:46,645 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 16:37:46,645 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:37:46,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:37:46,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:37:46,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:37:46,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:37:46,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:37:46,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:37:46,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:37:46,647 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 16:37:46,647 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 16:37:46,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:37:46,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 16:37:46,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d [2021-12-22 16:37:46,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:37:46,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:37:46,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:37:46,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:37:46,935 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:37:46,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-22 16:37:46,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9728e2c/b282c8e3a2ec473ebc6cb4d8b7b44900/FLAG3b07f986f [2021-12-22 16:37:47,354 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:37:47,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2021-12-22 16:37:47,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9728e2c/b282c8e3a2ec473ebc6cb4d8b7b44900/FLAG3b07f986f [2021-12-22 16:37:47,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9728e2c/b282c8e3a2ec473ebc6cb4d8b7b44900 [2021-12-22 16:37:47,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:37:47,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:37:47,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:37:47,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:37:47,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:37:47,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:37:47" (1/1) ... [2021-12-22 16:37:47,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae11911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:47, skipping insertion in model container [2021-12-22 16:37:47,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:37:47" (1/1) ... [2021-12-22 16:37:47,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:37:47,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:37:48,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:37:48,104 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 16:37:48,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:37:48,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:37:48,153 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:37:48,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:37:48,242 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:37:48,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48 WrapperNode [2021-12-22 16:37:48,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:37:48,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:37:48,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:37:48,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:37:48,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,292 INFO L137 Inliner]: procedures = 165, calls = 71, calls flagged for inlining = 23, calls inlined = 17, statements flattened = 120 [2021-12-22 16:37:48,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:37:48,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:37:48,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:37:48,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:37:48,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:37:48,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:37:48,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:37:48,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:37:48,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (1/1) ... [2021-12-22 16:37:48,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:37:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:37:48,347 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) [2021-12-22 16:37:48,349 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 [2021-12-22 16:37:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 16:37:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-22 16:37:48,374 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-22 16:37:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 16:37:48,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 16:37:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2021-12-22 16:37:48,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2021-12-22 16:37:48,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:37:48,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:37:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:37:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:37:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 16:37:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:37:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 16:37:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:37:48,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:37:48,518 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:37:48,532 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:37:48,844 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:37:48,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:37:48,853 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 16:37:48,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:37:48 BoogieIcfgContainer [2021-12-22 16:37:48,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:37:48,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:37:48,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:37:48,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:37:48,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:37:47" (1/3) ... [2021-12-22 16:37:48,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689ab22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:37:48, skipping insertion in model container [2021-12-22 16:37:48,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:37:48" (2/3) ... [2021-12-22 16:37:48,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689ab22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:37:48, skipping insertion in model container [2021-12-22 16:37:48,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:37:48" (3/3) ... [2021-12-22 16:37:48,864 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2-2.i [2021-12-22 16:37:48,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:37:48,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-22 16:37:48,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:37:48,915 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 [2021-12-22 16:37:48,915 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-22 16:37:48,936 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) [2021-12-22 16:37:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:37:48,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:48,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:48,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:48,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1790059245, now seen corresponding path program 1 times [2021-12-22 16:37:48,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:48,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715079944] [2021-12-22 16:37:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:48,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:48,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:48,977 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) [2021-12-22 16:37:49,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 16:37:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:37:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:49,119 INFO L387 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 [2021-12-22 16:37:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:49,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:49,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:49,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715079944] [2021-12-22 16:37:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715079944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:49,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:49,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:37:49,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610333859] [2021-12-22 16:37:49,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:49,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:37:49,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:37:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:37:49,190 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) [2021-12-22 16:37:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:49,475 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-12-22 16:37:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:37:49,478 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 [2021-12-22 16:37:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:49,485 INFO L225 Difference]: With dead ends: 153 [2021-12-22 16:37:49,486 INFO L226 Difference]: Without dead ends: 151 [2021-12-22 16:37:49,488 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 [2021-12-22 16:37:49,495 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:37:49,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 373 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:37:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-22 16:37:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2021-12-22 16:37:49,531 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) [2021-12-22 16:37:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2021-12-22 16:37:49,533 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 10 [2021-12-22 16:37:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:49,533 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2021-12-22 16:37:49,533 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) [2021-12-22 16:37:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2021-12-22 16:37:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:37:49,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:49,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:49,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:49,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:49,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1761430094, now seen corresponding path program 1 times [2021-12-22 16:37:49,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:49,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969437666] [2021-12-22 16:37:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:49,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:49,748 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) [2021-12-22 16:37:49,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 16:37:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:37:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:49,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:49,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969437666] [2021-12-22 16:37:49,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969437666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:49,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:49,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:37:49,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709212217] [2021-12-22 16:37:49,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:49,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:37:49,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:37:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:37:49,858 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) [2021-12-22 16:37:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:49,880 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-12-22 16:37:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:37:49,881 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 [2021-12-22 16:37:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:49,882 INFO L225 Difference]: With dead ends: 110 [2021-12-22 16:37:49,882 INFO L226 Difference]: Without dead ends: 110 [2021-12-22 16:37:49,882 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 [2021-12-22 16:37:49,883 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 [2021-12-22 16:37:49,883 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] [2021-12-22 16:37:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-22 16:37:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-12-22 16:37:49,888 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) [2021-12-22 16:37:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-22 16:37:49,892 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 10 [2021-12-22 16:37:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:49,892 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-22 16:37:49,892 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) [2021-12-22 16:37:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-22 16:37:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:37:49,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:49,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:49,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:50,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:50,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 342738302, now seen corresponding path program 1 times [2021-12-22 16:37:50,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:50,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391098234] [2021-12-22 16:37:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:50,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:50,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:50,104 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) [2021-12-22 16:37:50,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 16:37:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:37:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:50,169 INFO L387 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 [2021-12-22 16:37:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:50,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:50,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391098234] [2021-12-22 16:37:50,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391098234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:50,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:50,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:37:50,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48095204] [2021-12-22 16:37:50,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:50,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:37:50,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:37:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:37:50,245 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) [2021-12-22 16:37:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:50,522 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-12-22 16:37:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:37:50,522 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 [2021-12-22 16:37:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:50,523 INFO L225 Difference]: With dead ends: 128 [2021-12-22 16:37:50,523 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 16:37:50,523 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 [2021-12-22 16:37:50,524 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 69 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:37:50,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 465 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:37:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 16:37:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2021-12-22 16:37:50,529 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) [2021-12-22 16:37:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-22 16:37:50,530 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 11 [2021-12-22 16:37:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:50,530 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-22 16:37:50,531 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) [2021-12-22 16:37:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-22 16:37:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 16:37:50,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:50,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:50,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:50,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:50,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:50,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2034926041, now seen corresponding path program 1 times [2021-12-22 16:37:50,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:50,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320631815] [2021-12-22 16:37:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:50,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:50,740 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) [2021-12-22 16:37:50,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 16:37:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:37:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:50,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:50,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:50,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320631815] [2021-12-22 16:37:50,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320631815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:50,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:50,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:37:50,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261483657] [2021-12-22 16:37:50,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:50,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:37:50,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:50,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:37:50,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:37:50,829 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) [2021-12-22 16:37:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:50,842 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-12-22 16:37:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:37:50,842 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 [2021-12-22 16:37:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:50,843 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:37:50,843 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 16:37:50,843 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 [2021-12-22 16:37:50,844 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 [2021-12-22 16:37:50,844 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] [2021-12-22 16:37:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 16:37:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2021-12-22 16:37:50,848 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) [2021-12-22 16:37:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-12-22 16:37:50,849 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 12 [2021-12-22 16:37:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:50,849 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-12-22 16:37:50,849 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) [2021-12-22 16:37:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-12-22 16:37:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 16:37:50,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:50,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:50,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:51,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:51,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash -517230920, now seen corresponding path program 1 times [2021-12-22 16:37:51,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:51,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372308357] [2021-12-22 16:37:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:51,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:51,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:51,059 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) [2021-12-22 16:37:51,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 16:37:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:37:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:51,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:51,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:51,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372308357] [2021-12-22 16:37:51,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372308357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:51,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:51,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:37:51,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104916180] [2021-12-22 16:37:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:51,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:37:51,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:37:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:37:51,138 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) [2021-12-22 16:37:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:51,160 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-12-22 16:37:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:37:51,160 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 [2021-12-22 16:37:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:51,161 INFO L225 Difference]: With dead ends: 106 [2021-12-22 16:37:51,161 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 16:37:51,161 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 [2021-12-22 16:37:51,162 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 [2021-12-22 16:37:51,162 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] [2021-12-22 16:37:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 16:37:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2021-12-22 16:37:51,166 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) [2021-12-22 16:37:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-12-22 16:37:51,167 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 12 [2021-12-22 16:37:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:51,167 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-12-22 16:37:51,167 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) [2021-12-22 16:37:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-12-22 16:37:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 16:37:51,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:51,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:51,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:51,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1400250303, now seen corresponding path program 1 times [2021-12-22 16:37:51,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:51,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207334193] [2021-12-22 16:37:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:51,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:51,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:51,377 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) [2021-12-22 16:37:51,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 16:37:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:51,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:37:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:51,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:51,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207334193] [2021-12-22 16:37:51,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207334193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:51,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:51,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:37:51,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606246980] [2021-12-22 16:37:51,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:51,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:37:51,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:37:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:37:51,455 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) [2021-12-22 16:37:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:51,479 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-12-22 16:37:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:37:51,480 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 [2021-12-22 16:37:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:51,480 INFO L225 Difference]: With dead ends: 100 [2021-12-22 16:37:51,481 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 16:37:51,481 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 [2021-12-22 16:37:51,481 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 [2021-12-22 16:37:51,482 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] [2021-12-22 16:37:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 16:37:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-12-22 16:37:51,485 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) [2021-12-22 16:37:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-12-22 16:37:51,500 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 16 [2021-12-22 16:37:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:51,500 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-12-22 16:37:51,500 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) [2021-12-22 16:37:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-12-22 16:37:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:37:51,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:51,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:51,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-22 16:37:51,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:51,702 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:51,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1200886583, now seen corresponding path program 1 times [2021-12-22 16:37:51,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:51,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228522830] [2021-12-22 16:37:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:51,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:51,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:51,703 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) [2021-12-22 16:37:51,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 16:37:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:51,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:37:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:51,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:51,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228522830] [2021-12-22 16:37:51,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228522830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:51,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:51,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:37:51,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463939168] [2021-12-22 16:37:51,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:51,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:37:51,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:51,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:37:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:37:51,816 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) [2021-12-22 16:37:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:51,857 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-12-22 16:37:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:37:51,857 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 [2021-12-22 16:37:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:51,858 INFO L225 Difference]: With dead ends: 106 [2021-12-22 16:37:51,858 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 16:37:51,859 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 [2021-12-22 16:37:51,859 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 [2021-12-22 16:37:51,859 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] [2021-12-22 16:37:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 16:37:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-12-22 16:37:51,863 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) [2021-12-22 16:37:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-12-22 16:37:51,863 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 17 [2021-12-22 16:37:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:51,864 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-12-22 16:37:51,864 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) [2021-12-22 16:37:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-12-22 16:37:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:37:51,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:51,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:51,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-22 16:37:52,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:52,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -517345560, now seen corresponding path program 1 times [2021-12-22 16:37:52,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446141768] [2021-12-22 16:37:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:52,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:52,074 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) [2021-12-22 16:37:52,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 16:37:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:37:52,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:52,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:37:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:52,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:52,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446141768] [2021-12-22 16:37:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446141768] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:37:52,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:37:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:37:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544759155] [2021-12-22 16:37:52,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:37:52,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:37:52,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:37:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:37:52,215 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) [2021-12-22 16:37:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:52,266 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2021-12-22 16:37:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:37:52,267 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 [2021-12-22 16:37:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:52,267 INFO L225 Difference]: With dead ends: 107 [2021-12-22 16:37:52,267 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 16:37:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:37:52,268 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 [2021-12-22 16:37:52,268 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] [2021-12-22 16:37:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 16:37:52,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-12-22 16:37:52,270 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) [2021-12-22 16:37:52,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-12-22 16:37:52,271 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 17 [2021-12-22 16:37:52,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:52,271 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-12-22 16:37:52,271 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) [2021-12-22 16:37:52,271 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-12-22 16:37:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 16:37:52,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:52,272 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:52,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:52,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:52,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash -613690879, now seen corresponding path program 2 times [2021-12-22 16:37:52,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:52,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406247400] [2021-12-22 16:37:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:37:52,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:52,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:52,491 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) [2021-12-22 16:37:52,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 16:37:52,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:37:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:37:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:37:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:52,554 INFO L387 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 [2021-12-22 16:37:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 16:37:52,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:52,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:52,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406247400] [2021-12-22 16:37:52,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406247400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:52,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:52,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:37:52,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928415799] [2021-12-22 16:37:52,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:52,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:37:52,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:52,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:37:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:37:52,611 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) [2021-12-22 16:37:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:52,861 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-22 16:37:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:37:52,861 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 [2021-12-22 16:37:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:52,862 INFO L225 Difference]: With dead ends: 136 [2021-12-22 16:37:52,862 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 16:37:52,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:37:52,862 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:37:52,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 511 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:37:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 16:37:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-12-22 16:37:52,866 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) [2021-12-22 16:37:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-12-22 16:37:52,866 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 20 [2021-12-22 16:37:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:52,867 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-12-22 16:37:52,867 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) [2021-12-22 16:37:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-12-22 16:37:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 16:37:52,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:52,867 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:52,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:53,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:53,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash -613690878, now seen corresponding path program 1 times [2021-12-22 16:37:53,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976065492] [2021-12-22 16:37:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:53,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:53,090 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) [2021-12-22 16:37:53,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 16:37:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:37:53,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:53,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:37:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:53,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976065492] [2021-12-22 16:37:53,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976065492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:37:53,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:37:53,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-22 16:37:53,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720476151] [2021-12-22 16:37:53,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:37:53,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:37:53,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:37:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:37:53,397 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) [2021-12-22 16:37:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:53,592 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-12-22 16:37:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:37:53,593 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 [2021-12-22 16:37:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:53,593 INFO L225 Difference]: With dead ends: 112 [2021-12-22 16:37:53,593 INFO L226 Difference]: Without dead ends: 112 [2021-12-22 16:37:53,594 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 [2021-12-22 16:37:53,594 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 [2021-12-22 16:37:53,594 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] [2021-12-22 16:37:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-22 16:37:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-22 16:37:53,597 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) [2021-12-22 16:37:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-12-22 16:37:53,597 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 20 [2021-12-22 16:37:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:53,597 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-12-22 16:37:53,597 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) [2021-12-22 16:37:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-12-22 16:37:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:37:53,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:53,598 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] [2021-12-22 16:37:53,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:53,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:53,806 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash -694582635, now seen corresponding path program 1 times [2021-12-22 16:37:53,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:53,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158890192] [2021-12-22 16:37:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:53,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:53,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:53,808 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) [2021-12-22 16:37:53,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 16:37:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:37:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:37:53,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:53,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158890192] [2021-12-22 16:37:53,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158890192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:53,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:53,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:37:53,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857671225] [2021-12-22 16:37:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:53,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:37:53,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:37:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:37:53,901 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) [2021-12-22 16:37:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:53,993 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-12-22 16:37:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:37:53,994 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 [2021-12-22 16:37:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:53,994 INFO L225 Difference]: With dead ends: 115 [2021-12-22 16:37:53,994 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 16:37:53,994 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 [2021-12-22 16:37:53,995 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 [2021-12-22 16:37:53,995 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] [2021-12-22 16:37:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 16:37:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-12-22 16:37:53,997 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) [2021-12-22 16:37:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-12-22 16:37:53,997 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 25 [2021-12-22 16:37:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-12-22 16:37:53,997 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) [2021-12-22 16:37:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-12-22 16:37:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:37:53,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:53,998 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:54,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:54,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:54,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1800263842, now seen corresponding path program 2 times [2021-12-22 16:37:54,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608194080] [2021-12-22 16:37:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:37:54,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:54,206 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) [2021-12-22 16:37:54,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 16:37:54,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:37:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:37:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 16:37:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:54,281 INFO L387 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 [2021-12-22 16:37:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 16:37:54,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:54,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608194080] [2021-12-22 16:37:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608194080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:54,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:54,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 16:37:54,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662989312] [2021-12-22 16:37:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:37:54,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:37:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:37:54,436 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) [2021-12-22 16:37:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:54,884 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2021-12-22 16:37:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:37:54,884 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 [2021-12-22 16:37:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:54,885 INFO L225 Difference]: With dead ends: 135 [2021-12-22 16:37:54,885 INFO L226 Difference]: Without dead ends: 135 [2021-12-22 16:37:54,885 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 [2021-12-22 16:37:54,886 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:37:54,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 591 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:37:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-22 16:37:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2021-12-22 16:37:54,888 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) [2021-12-22 16:37:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-12-22 16:37:54,889 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 26 [2021-12-22 16:37:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:54,889 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-12-22 16:37:54,889 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) [2021-12-22 16:37:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-12-22 16:37:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:37:54,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:54,889 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:54,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-22 16:37:55,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:55,096 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash -819776159, now seen corresponding path program 1 times [2021-12-22 16:37:55,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:55,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671147913] [2021-12-22 16:37:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:55,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:55,098 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) [2021-12-22 16:37:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 16:37:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:37:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:55,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:37:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:37:55,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:55,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671147913] [2021-12-22 16:37:55,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671147913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:37:55,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:37:55,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-22 16:37:55,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302002956] [2021-12-22 16:37:55,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:37:55,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 16:37:55,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 16:37:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:37:55,763 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) [2021-12-22 16:37:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:56,116 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-12-22 16:37:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:37:56,117 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 [2021-12-22 16:37:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:56,117 INFO L225 Difference]: With dead ends: 100 [2021-12-22 16:37:56,117 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 16:37:56,118 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 [2021-12-22 16:37:56,118 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 29 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 16:37:56,118 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] [2021-12-22 16:37:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 16:37:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-12-22 16:37:56,120 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) [2021-12-22 16:37:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-12-22 16:37:56,121 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 28 [2021-12-22 16:37:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:56,121 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-12-22 16:37:56,121 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) [2021-12-22 16:37:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-12-22 16:37:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 16:37:56,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:56,121 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:37:56,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:56,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:56,328 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1570464767, now seen corresponding path program 2 times [2021-12-22 16:37:56,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021398092] [2021-12-22 16:37:56,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:37:56,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:56,330 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) [2021-12-22 16:37:56,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 16:37:56,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:37:56,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:37:56,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:37:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:37:56,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:56,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021398092] [2021-12-22 16:37:56,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021398092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:56,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:56,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:37:56,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628641594] [2021-12-22 16:37:56,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:56,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:37:56,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:37:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:37:56,479 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) [2021-12-22 16:37:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:56,504 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-12-22 16:37:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:37:56,505 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 [2021-12-22 16:37:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:56,505 INFO L225 Difference]: With dead ends: 100 [2021-12-22 16:37:56,505 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 16:37:56,506 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 [2021-12-22 16:37:56,506 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 [2021-12-22 16:37:56,506 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] [2021-12-22 16:37:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 16:37:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-12-22 16:37:56,509 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) [2021-12-22 16:37:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2021-12-22 16:37:56,509 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 34 [2021-12-22 16:37:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:56,509 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2021-12-22 16:37:56,510 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) [2021-12-22 16:37:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2021-12-22 16:37:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 16:37:56,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:56,512 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] [2021-12-22 16:37:56,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:56,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:56,718 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)] === [2021-12-22 16:37:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash -234355352, now seen corresponding path program 1 times [2021-12-22 16:37:56,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:56,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533005918] [2021-12-22 16:37:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:56,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:56,729 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) [2021-12-22 16:37:56,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 16:37:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:56,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:37:56,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:56,870 INFO L387 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 [2021-12-22 16:37:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:37:56,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:56,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:56,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533005918] [2021-12-22 16:37:56,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533005918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:56,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:56,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 16:37:56,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584611250] [2021-12-22 16:37:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:37:56,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:37:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:37:56,957 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) [2021-12-22 16:37:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:57,318 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-12-22 16:37:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:37:57,319 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 [2021-12-22 16:37:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:57,320 INFO L225 Difference]: With dead ends: 98 [2021-12-22 16:37:57,320 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 16:37:57,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:37:57,320 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 74 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:37:57,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 378 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:37:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 16:37:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 16:37:57,322 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) [2021-12-22 16:37:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-12-22 16:37:57,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 36 [2021-12-22 16:37:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:57,323 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-12-22 16:37:57,323 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) [2021-12-22 16:37:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-12-22 16:37:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 16:37:57,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:57,323 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] [2021-12-22 16:37:57,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-22 16:37:57,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:57,534 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)] === [2021-12-22 16:37:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash -234355351, now seen corresponding path program 1 times [2021-12-22 16:37:57,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:57,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409468752] [2021-12-22 16:37:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:57,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:57,536 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) [2021-12-22 16:37:57,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 16:37:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 16:37:57,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:57,693 INFO L387 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 [2021-12-22 16:37:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:37:57,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:57,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:57,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409468752] [2021-12-22 16:37:57,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409468752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:57,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:57,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:37:57,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230747803] [2021-12-22 16:37:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:57,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:37:57,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:37:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:37:57,888 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) [2021-12-22 16:37:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:58,141 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-12-22 16:37:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:37:58,141 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 [2021-12-22 16:37:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:58,142 INFO L225 Difference]: With dead ends: 96 [2021-12-22 16:37:58,142 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 16:37:58,142 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 [2021-12-22 16:37:58,143 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:37:58,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 461 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:37:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 16:37:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-22 16:37:58,144 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) [2021-12-22 16:37:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-12-22 16:37:58,145 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 36 [2021-12-22 16:37:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:58,145 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-12-22 16:37:58,145 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) [2021-12-22 16:37:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-12-22 16:37:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 16:37:58,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:58,145 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] [2021-12-22 16:37:58,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:58,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:58,346 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash -285061459, now seen corresponding path program 1 times [2021-12-22 16:37:58,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:58,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677318705] [2021-12-22 16:37:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:58,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:58,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:58,363 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) [2021-12-22 16:37:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 16:37:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:37:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:37:58,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:58,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677318705] [2021-12-22 16:37:58,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677318705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:58,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:58,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:37:58,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121232675] [2021-12-22 16:37:58,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:37:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:37:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:37:58,602 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) [2021-12-22 16:37:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:58,643 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-12-22 16:37:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:37:58,644 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 [2021-12-22 16:37:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:58,644 INFO L225 Difference]: With dead ends: 96 [2021-12-22 16:37:58,644 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 16:37:58,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:37:58,645 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 [2021-12-22 16:37:58,645 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] [2021-12-22 16:37:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 16:37:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-22 16:37:58,647 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) [2021-12-22 16:37:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-12-22 16:37:58,647 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 36 [2021-12-22 16:37:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-12-22 16:37:58,648 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) [2021-12-22 16:37:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-12-22 16:37:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 16:37:58,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:58,648 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] [2021-12-22 16:37:58,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-22 16:37:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:58,856 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1910239882, now seen corresponding path program 1 times [2021-12-22 16:37:58,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320164606] [2021-12-22 16:37:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:58,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:58,858 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) [2021-12-22 16:37:58,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 16:37:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:59,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:37:59,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:59,012 INFO L387 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 [2021-12-22 16:37:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:37:59,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:59,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:59,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320164606] [2021-12-22 16:37:59,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320164606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:59,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:59,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 16:37:59,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987105453] [2021-12-22 16:37:59,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:59,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:37:59,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:37:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:37:59,124 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) [2021-12-22 16:37:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:37:59,306 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-12-22 16:37:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:37:59,306 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 [2021-12-22 16:37:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:37:59,307 INFO L225 Difference]: With dead ends: 97 [2021-12-22 16:37:59,307 INFO L226 Difference]: Without dead ends: 97 [2021-12-22 16:37:59,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:37:59,307 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 61 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 16:37:59,307 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] [2021-12-22 16:37:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-22 16:37:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-12-22 16:37:59,309 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) [2021-12-22 16:37:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-12-22 16:37:59,310 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-12-22 16:37:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:37:59,310 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-12-22 16:37:59,310 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) [2021-12-22 16:37:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-12-22 16:37:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 16:37:59,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:37:59,310 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] [2021-12-22 16:37:59,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-22 16:37:59,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:37:59,519 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:37:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:37:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1910239883, now seen corresponding path program 1 times [2021-12-22 16:37:59,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:37:59,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152988447] [2021-12-22 16:37:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:37:59,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:37:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:37:59,521 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) [2021-12-22 16:37:59,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 16:37:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:37:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 16:37:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:37:59,727 INFO L387 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 [2021-12-22 16:37:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:37:59,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:37:59,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:37:59,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152988447] [2021-12-22 16:37:59,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152988447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:37:59,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:37:59,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:37:59,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802628863] [2021-12-22 16:37:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:37:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:37:59,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:37:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:37:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:37:59,976 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) [2021-12-22 16:38:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:00,192 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-12-22 16:38:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:38:00,193 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 [2021-12-22 16:38:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:00,193 INFO L225 Difference]: With dead ends: 99 [2021-12-22 16:38:00,193 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 16:38:00,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:38:00,194 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 64 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 16:38:00,194 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] [2021-12-22 16:38:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 16:38:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2021-12-22 16:38:00,196 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) [2021-12-22 16:38:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-12-22 16:38:00,196 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 44 [2021-12-22 16:38:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:00,196 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-12-22 16:38:00,196 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) [2021-12-22 16:38:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-12-22 16:38:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 16:38:00,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:00,197 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] [2021-12-22 16:38:00,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:00,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:00,404 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1609523877, now seen corresponding path program 1 times [2021-12-22 16:38:00,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:00,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470304891] [2021-12-22 16:38:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:00,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:00,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:00,406 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) [2021-12-22 16:38:00,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-22 16:38:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:38:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:00,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:00,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:00,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470304891] [2021-12-22 16:38:00,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470304891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:00,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:00,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:38:00,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254004646] [2021-12-22 16:38:00,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:00,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:38:00,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:38:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:38:00,687 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) [2021-12-22 16:38:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:00,730 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-12-22 16:38:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:38:00,730 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 [2021-12-22 16:38:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:00,731 INFO L225 Difference]: With dead ends: 92 [2021-12-22 16:38:00,731 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 16:38:00,731 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 [2021-12-22 16:38:00,732 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 [2021-12-22 16:38:00,732 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] [2021-12-22 16:38:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 16:38:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-22 16:38:00,738 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) [2021-12-22 16:38:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-22 16:38:00,739 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 49 [2021-12-22 16:38:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:00,739 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-22 16:38:00,739 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) [2021-12-22 16:38:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-22 16:38:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 16:38:00,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:00,740 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] [2021-12-22 16:38:00,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:00,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:00,949 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1068375809, now seen corresponding path program 1 times [2021-12-22 16:38:00,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:00,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464213501] [2021-12-22 16:38:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:00,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:00,951 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) [2021-12-22 16:38:00,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-22 16:38:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:38:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:01,162 INFO L387 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 [2021-12-22 16:38:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:01,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:01,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464213501] [2021-12-22 16:38:01,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464213501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:01,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:01,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 16:38:01,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5953370] [2021-12-22 16:38:01,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:01,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:38:01,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:38:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:38:01,394 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) [2021-12-22 16:38:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:01,637 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-12-22 16:38:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:38:01,638 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 [2021-12-22 16:38:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:01,638 INFO L225 Difference]: With dead ends: 122 [2021-12-22 16:38:01,638 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 16:38:01,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:38:01,639 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 [2021-12-22 16:38:01,639 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] [2021-12-22 16:38:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 16:38:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2021-12-22 16:38:01,641 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) [2021-12-22 16:38:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2021-12-22 16:38:01,642 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 55 [2021-12-22 16:38:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:01,642 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2021-12-22 16:38:01,642 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) [2021-12-22 16:38:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2021-12-22 16:38:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 16:38:01,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:01,643 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] [2021-12-22 16:38:01,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:01,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:01,856 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_kobject_putErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1068375808, now seen corresponding path program 1 times [2021-12-22 16:38:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983650189] [2021-12-22 16:38:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:01,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:01,865 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) [2021-12-22 16:38:01,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-22 16:38:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:02,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 16:38:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:02,105 INFO L387 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 [2021-12-22 16:38:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:02,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:02,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983650189] [2021-12-22 16:38:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983650189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:02,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:02,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 16:38:02,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8037606] [2021-12-22 16:38:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:38:02,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:38:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:38:02,405 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) [2021-12-22 16:38:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:02,669 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2021-12-22 16:38:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:38:02,669 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 [2021-12-22 16:38:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:02,670 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:38:02,670 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 16:38:02,670 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 [2021-12-22 16:38:02,670 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 [2021-12-22 16:38:02,670 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] [2021-12-22 16:38:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 16:38:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-12-22 16:38:02,673 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) [2021-12-22 16:38:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-12-22 16:38:02,673 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 55 [2021-12-22 16:38:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:02,673 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-12-22 16:38:02,673 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) [2021-12-22 16:38:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-12-22 16:38:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 16:38:02,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:02,674 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] [2021-12-22 16:38:02,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:02,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:02,881 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash 7191578, now seen corresponding path program 1 times [2021-12-22 16:38:02,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:02,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70173296] [2021-12-22 16:38:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:02,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:02,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:02,884 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) [2021-12-22 16:38:02,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-22 16:38:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:38:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:03,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:03,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:03,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70173296] [2021-12-22 16:38:03,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70173296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:03,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:03,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:38:03,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363975291] [2021-12-22 16:38:03,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:03,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:38:03,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:38:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:38:03,244 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) [2021-12-22 16:38:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:03,307 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-12-22 16:38:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:38:03,307 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 [2021-12-22 16:38:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:03,308 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:38:03,308 INFO L226 Difference]: Without dead ends: 105 [2021-12-22 16:38:03,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:38:03,308 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:38:03,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 456 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:38:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-22 16:38:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-22 16:38:03,310 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) [2021-12-22 16:38:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-22 16:38:03,311 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 60 [2021-12-22 16:38:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:03,311 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-22 16:38:03,311 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) [2021-12-22 16:38:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-22 16:38:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 16:38:03,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:03,311 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] [2021-12-22 16:38:03,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:03,520 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 392980163, now seen corresponding path program 1 times [2021-12-22 16:38:03,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:03,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688590623] [2021-12-22 16:38:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:03,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:03,521 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) [2021-12-22 16:38:03,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-22 16:38:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 16:38:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:03,796 INFO L387 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 [2021-12-22 16:38:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:04,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:04,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:04,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688590623] [2021-12-22 16:38:04,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688590623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:04,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:04,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 16:38:04,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433188982] [2021-12-22 16:38:04,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:04,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:38:04,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:38:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:38:04,021 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) [2021-12-22 16:38:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:04,261 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-22 16:38:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:38:04,261 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 [2021-12-22 16:38:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:04,263 INFO L225 Difference]: With dead ends: 112 [2021-12-22 16:38:04,263 INFO L226 Difference]: Without dead ends: 112 [2021-12-22 16:38:04,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:38:04,264 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 [2021-12-22 16:38:04,264 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] [2021-12-22 16:38:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-22 16:38:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2021-12-22 16:38:04,269 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) [2021-12-22 16:38:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-12-22 16:38:04,270 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 61 [2021-12-22 16:38:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:04,270 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-12-22 16:38:04,271 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) [2021-12-22 16:38:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-12-22 16:38:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 16:38:04,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:04,272 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] [2021-12-22 16:38:04,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:04,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:04,483 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:04,483 INFO L85 PathProgramCache]: Analyzing trace with hash 392980164, now seen corresponding path program 1 times [2021-12-22 16:38:04,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:04,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532624089] [2021-12-22 16:38:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:04,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:04,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:04,485 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) [2021-12-22 16:38:04,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-22 16:38:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 16:38:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:04,768 INFO L387 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 [2021-12-22 16:38:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:05,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:05,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:05,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532624089] [2021-12-22 16:38:05,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532624089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:05,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:05,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 16:38:05,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182601243] [2021-12-22 16:38:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:05,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:38:05,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:38:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:38:05,035 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) [2021-12-22 16:38:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:05,420 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-12-22 16:38:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:38:05,421 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 [2021-12-22 16:38:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:05,421 INFO L225 Difference]: With dead ends: 103 [2021-12-22 16:38:05,421 INFO L226 Difference]: Without dead ends: 103 [2021-12-22 16:38:05,422 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 [2021-12-22 16:38:05,422 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 [2021-12-22 16:38:05,422 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] [2021-12-22 16:38:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-22 16:38:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-22 16:38:05,424 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) [2021-12-22 16:38:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-12-22 16:38:05,424 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 61 [2021-12-22 16:38:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:05,424 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-12-22 16:38:05,425 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) [2021-12-22 16:38:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-12-22 16:38:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 16:38:05,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:05,425 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] [2021-12-22 16:38:05,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:05,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:05,637 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)] === [2021-12-22 16:38:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -808735445, now seen corresponding path program 1 times [2021-12-22 16:38:05,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:05,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788715351] [2021-12-22 16:38:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:05,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:05,639 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) [2021-12-22 16:38:05,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-22 16:38:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 16:38:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:06,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:06,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:06,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788715351] [2021-12-22 16:38:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788715351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:06,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:06,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 16:38:06,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435170251] [2021-12-22 16:38:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:06,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:38:06,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:38:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:38:06,361 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) [2021-12-22 16:38:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:06,639 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-12-22 16:38:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:38:06,640 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 [2021-12-22 16:38:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:06,641 INFO L225 Difference]: With dead ends: 102 [2021-12-22 16:38:06,641 INFO L226 Difference]: Without dead ends: 102 [2021-12-22 16:38:06,641 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 [2021-12-22 16:38:06,641 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 157 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 16:38:06,641 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] [2021-12-22 16:38:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-22 16:38:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-22 16:38:06,643 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) [2021-12-22 16:38:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-12-22 16:38:06,644 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 64 [2021-12-22 16:38:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:06,644 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-12-22 16:38:06,644 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) [2021-12-22 16:38:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-12-22 16:38:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 16:38:06,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:06,645 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] [2021-12-22 16:38:06,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:06,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:06,852 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1477848750, now seen corresponding path program 1 times [2021-12-22 16:38:06,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:06,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561354927] [2021-12-22 16:38:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:06,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:06,854 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) [2021-12-22 16:38:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-22 16:38:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:07,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 16:38:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:07,174 INFO L387 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 [2021-12-22 16:38:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:07,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:38:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:07,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561354927] [2021-12-22 16:38:07,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561354927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:38:07,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:38:07,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-12-22 16:38:07,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588140075] [2021-12-22 16:38:07,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:38:07,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:38:07,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:38:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:38:07,596 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) [2021-12-22 16:38:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:07,869 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-12-22 16:38:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 16:38:07,870 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 [2021-12-22 16:38:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:07,871 INFO L225 Difference]: With dead ends: 128 [2021-12-22 16:38:07,871 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 16:38:07,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:38:07,872 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 [2021-12-22 16:38:07,872 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] [2021-12-22 16:38:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 16:38:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-12-22 16:38:07,874 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) [2021-12-22 16:38:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2021-12-22 16:38:07,875 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 68 [2021-12-22 16:38:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:07,875 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2021-12-22 16:38:07,875 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) [2021-12-22 16:38:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2021-12-22 16:38:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 16:38:07,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:07,875 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] [2021-12-22 16:38:07,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:08,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:08,085 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)] === [2021-12-22 16:38:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1729031655, now seen corresponding path program 1 times [2021-12-22 16:38:08,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:08,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180652975] [2021-12-22 16:38:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:08,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:08,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:08,088 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) [2021-12-22 16:38:08,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-22 16:38:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-22 16:38:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:08,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:08,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:08,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:08,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:08,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:08,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:08,625 INFO L387 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 [2021-12-22 16:38:11,258 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2206 (_ BitVec 8)) (v_ArrVal_2208 (_ BitVec 8))) (= (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)) |c_#memory_int|)) is different from true [2021-12-22 16:38:11,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,274 INFO L387 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 [2021-12-22 16:38:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:11,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:11,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:11,555 INFO L387 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 [2021-12-22 16:38:11,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:11,724 INFO L387 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 [2021-12-22 16:38:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:11,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:38:11,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:11,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180652975] [2021-12-22 16:38:11,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180652975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:38:11,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:38:11,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-12-22 16:38:11,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730151697] [2021-12-22 16:38:11,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:38:11,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 16:38:11,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 16:38:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=591, Unknown=2, NotChecked=48, Total=702 [2021-12-22 16:38:11,936 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) [2021-12-22 16:38:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:12,635 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-12-22 16:38:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 16:38:12,636 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 [2021-12-22 16:38:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:12,637 INFO L225 Difference]: With dead ends: 100 [2021-12-22 16:38:12,637 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 16:38:12,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=134, Invalid=1128, Unknown=2, NotChecked=68, Total=1332 [2021-12-22 16:38:12,638 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 [2021-12-22 16:38:12,638 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] [2021-12-22 16:38:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 16:38:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-12-22 16:38:12,639 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) [2021-12-22 16:38:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-22 16:38:12,640 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 67 [2021-12-22 16:38:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:12,640 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-22 16:38:12,640 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) [2021-12-22 16:38:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-22 16:38:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 16:38:12,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:12,640 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] [2021-12-22 16:38:12,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:12,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:12,841 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1342862122, now seen corresponding path program 1 times [2021-12-22 16:38:12,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:12,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191254601] [2021-12-22 16:38:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:12,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:12,843 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) [2021-12-22 16:38:12,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-22 16:38:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 16:38:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:13,202 INFO L387 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 [2021-12-22 16:38:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:13,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:38:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 16:38:13,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191254601] [2021-12-22 16:38:13,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191254601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:38:13,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:38:13,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-12-22 16:38:13,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016846293] [2021-12-22 16:38:13,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:38:13,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:38:13,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:38:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:38:13,683 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) [2021-12-22 16:38:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:38:13,991 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-22 16:38:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 16:38:13,991 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 [2021-12-22 16:38:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:38:13,992 INFO L225 Difference]: With dead ends: 102 [2021-12-22 16:38:13,992 INFO L226 Difference]: Without dead ends: 102 [2021-12-22 16:38:13,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:38:13,992 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:38:13,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 414 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 241 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2021-12-22 16:38:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-22 16:38:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-12-22 16:38:13,994 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) [2021-12-22 16:38:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-12-22 16:38:13,994 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 74 [2021-12-22 16:38:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:38:13,994 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-12-22 16:38:13,994 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) [2021-12-22 16:38:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-12-22 16:38:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 16:38:13,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:38:13,995 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] [2021-12-22 16:38:14,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-22 16:38:14,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:38:14,195 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:38:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:38:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1943196067, now seen corresponding path program 1 times [2021-12-22 16:38:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:38:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561213095] [2021-12-22 16:38:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:14,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:38:14,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:38:14,197 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) [2021-12-22 16:38:14,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-22 16:38:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-22 16:38:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:14,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:14,779 INFO L387 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 [2021-12-22 16:38:20,071 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 [2021-12-22 16:38:20,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:20,105 INFO L387 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 [2021-12-22 16:38:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:20,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:20,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:20,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:20,458 INFO L387 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 [2021-12-22 16:38:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:21,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:21,029 INFO L387 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 [2021-12-22 16:38:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-22 16:38:25,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:38:49,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:38:49,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561213095] [2021-12-22 16:38:49,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561213095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:38:49,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385565502] [2021-12-22 16:38:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:38:49,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 16:38:49,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 16:38:49,074 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) [2021-12-22 16:38:49,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-22 16:38:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:38:50,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-22 16:38:50,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:38:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:52,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:52,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:52,531 INFO L387 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 [2021-12-22 16:38:55,255 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2765 (_ BitVec 8)) (v_ArrVal_2561 (_ BitVec 8))) (= (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_2765)) |c_#memory_int|)) is different from true [2021-12-22 16:38:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:55,283 INFO L387 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 [2021-12-22 16:38:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:55,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:55,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:38:55,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:55,478 INFO L387 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 [2021-12-22 16:38:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:38:55,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:38:55,681 INFO L387 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 [2021-12-22 16:38:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 16:38:55,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:38:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385565502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:38:57,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:38:57,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 43] total 44 [2021-12-22 16:38:57,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712501411] [2021-12-22 16:38:57,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:38:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-22 16:38:57,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:38:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-22 16:38:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3825, Unknown=13, NotChecked=250, Total=4290 [2021-12-22 16:38:57,566 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 44 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 16:39:01,335 WARN L860 $PredicateComparison]: unable to prove that (and (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)))) (exists ((v_ArrVal_2765 (_ BitVec 8)) (v_ArrVal_2561 (_ BitVec 8))) (= (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_2765)) |c_#memory_int|))) is different from true