./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.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 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:44:23,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:44:23,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:44:23,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:44:23,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:44:23,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:44:23,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:44:23,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:44:23,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:44:23,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:44:23,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:44:23,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:44:23,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:44:23,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:44:23,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:44:23,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:44:23,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:44:23,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:44:23,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:44:23,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:44:23,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:44:23,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:44:23,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:44:23,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:44:23,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:44:23,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:44:23,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:44:23,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:44:23,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:44:23,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:44:23,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:44:23,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:44:23,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:44:23,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:44:23,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:44:23,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:44:23,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:44:23,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:44:23,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:44:23,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:44:23,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:44:23,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:44:23,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:44:23,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:44:23,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:44:23,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:44:23,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:44:23,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:44:23,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:44:23,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:44:23,726 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:44:23,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:44:23,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:44:23,728 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:44:23,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:44:23,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:44:23,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:44:23,728 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:44:23,728 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:44:23,729 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:44:23,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:44:23,729 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:44:23,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:44:23,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:44:23,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:44:23,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:44:23,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:44:23,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:44:23,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:44:23,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:44:23,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:44:23,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:44:23,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:44:23,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 [2021-12-14 19:44:23,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:44:23,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:44:23,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:44:23,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:44:23,957 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:44:23,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2021-12-14 19:44:24,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e21bdc9/cd26f0dd3dad453997218c670f700083/FLAG764170e56 [2021-12-14 19:44:24,391 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:44:24,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2021-12-14 19:44:24,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e21bdc9/cd26f0dd3dad453997218c670f700083/FLAG764170e56 [2021-12-14 19:44:24,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e21bdc9/cd26f0dd3dad453997218c670f700083 [2021-12-14 19:44:24,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:44:24,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:44:24,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:44:24,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:44:24,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:44:24,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:44:24" (1/1) ... [2021-12-14 19:44:24,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333cd75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:24, skipping insertion in model container [2021-12-14 19:44:24,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:44:24" (1/1) ... [2021-12-14 19:44:24,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:44:24,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:44:24,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:44:24,775 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-14 19:44:24,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7de367ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:24, skipping insertion in model container [2021-12-14 19:44:24,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:44:24,777 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-14 19:44:24,779 INFO L158 Benchmark]: Toolchain (without parser) took 340.70ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.8MB in the beginning and 75.9MB in the end (delta: -24.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 19:44:24,780 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 86.0MB. Free memory was 41.5MB in the beginning and 41.4MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:44:24,781 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.05ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.5MB in the beginning and 75.9MB in the end (delta: -24.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 19:44:24,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 86.0MB. Free memory was 41.5MB in the beginning and 41.4MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 329.05ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.5MB in the beginning and 75.9MB in the end (delta: -24.4MB). 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_test4-2.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 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:44:26,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:44:26,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:44:26,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:44:26,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:44:26,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:44:26,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:44:26,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:44:26,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:44:26,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:44:26,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:44:26,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:44:26,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:44:26,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:44:26,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:44:26,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:44:26,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:44:26,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:44:26,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:44:26,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:44:26,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:44:26,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:44:26,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:44:26,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:44:26,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:44:26,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:44:26,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:44:26,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:44:26,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:44:26,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:44:26,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:44:26,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:44:26,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:44:26,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:44:26,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:44:26,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:44:26,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:44:26,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:44:26,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:44:26,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:44:26,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:44:26,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-14 19:44:26,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:44:26,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:44:26,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:44:26,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:44:26,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:44:26,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:44:26,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:44:26,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:44:26,616 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:44:26,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:44:26,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:44:26,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:44:26,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:44:26,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:44:26,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:44:26,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 19:44:26,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:44:26,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:44:26,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:44:26,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:44:26,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:44:26,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:44:26,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:44:26,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:44:26,620 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 19:44:26,620 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 19:44:26,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:44:26,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 19:44:26,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 [2021-12-14 19:44:26,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:44:26,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:44:26,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:44:26,953 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:44:26,968 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:44:26,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2021-12-14 19:44:27,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce69979bb/224e7f82c4104059aa1d8ccaa20fef97/FLAGfd6310895 [2021-12-14 19:44:27,714 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:44:27,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2021-12-14 19:44:27,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce69979bb/224e7f82c4104059aa1d8ccaa20fef97/FLAGfd6310895 [2021-12-14 19:44:27,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce69979bb/224e7f82c4104059aa1d8ccaa20fef97 [2021-12-14 19:44:27,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:44:27,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:44:27,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:44:27,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:44:27,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:44:27,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:44:27" (1/1) ... [2021-12-14 19:44:27,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2105b7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:27, skipping insertion in model container [2021-12-14 19:44:27,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:44:27" (1/1) ... [2021-12-14 19:44:27,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:44:28,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:44:28,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:44:28,319 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-14 19:44:28,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:44:28,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:44:28,369 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:44:28,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:44:28,451 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:44:28,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28 WrapperNode [2021-12-14 19:44:28,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:44:28,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:44:28,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:44:28,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:44:28,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,503 INFO L137 Inliner]: procedures = 165, calls = 71, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 26 [2021-12-14 19:44:28,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:44:28,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:44:28,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:44:28,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:44:28,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:44:28,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:44:28,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:44:28,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:44:28,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (1/1) ... [2021-12-14 19:44:28,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:44:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:44:28,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 19:44:28,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 19:44:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 19:44:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 19:44:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:44:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:44:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:44:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 19:44:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:44:28,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:44:28,761 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:44:28,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:44:28,847 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:44:28,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:44:28,851 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 19:44:28,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:44:28 BoogieIcfgContainer [2021-12-14 19:44:28,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:44:28,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:44:28,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:44:28,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:44:28,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:44:27" (1/3) ... [2021-12-14 19:44:28,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177f4d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:44:28, skipping insertion in model container [2021-12-14 19:44:28,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:44:28" (2/3) ... [2021-12-14 19:44:28,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177f4d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:44:28, skipping insertion in model container [2021-12-14 19:44:28,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:44:28" (3/3) ... [2021-12-14 19:44:28,857 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test4-2.i [2021-12-14 19:44:28,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:44:28,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-12-14 19:44:28,896 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:44:28,901 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 19:44:28,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-14 19:44:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:44:28,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:28,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:28,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1438496263, now seen corresponding path program 1 times [2021-12-14 19:44:28,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:28,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851872900] [2021-12-14 19:44:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:28,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:28,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:28,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 19:44:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:44:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:29,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:29,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:29,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851872900] [2021-12-14 19:44:29,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851872900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:29,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:29,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:44:29,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163327177] [2021-12-14 19:44:29,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:44:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:44:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:29,142 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:44:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:29,186 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-12-14 19:44:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:44:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-14 19:44:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:29,194 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:44:29,194 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:44:29,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:29,201 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:29,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 145 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:44:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:44:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2021-12-14 19:44:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:44:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-14 19:44:29,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-14 19:44:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:29,231 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-14 19:44:29,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:44:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-14 19:44:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:44:29,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:29,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:29,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:29,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:29,444 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash -550992582, now seen corresponding path program 1 times [2021-12-14 19:44:29,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:29,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382603451] [2021-12-14 19:44:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:29,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:29,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:29,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 19:44:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:44:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:29,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:29,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382603451] [2021-12-14 19:44:29,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382603451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:29,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:29,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:44:29,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770655729] [2021-12-14 19:44:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:29,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:44:29,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:44:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:44:29,528 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:44:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:29,566 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-14 19:44:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:44:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-14 19:44:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:29,567 INFO L225 Difference]: With dead ends: 40 [2021-12-14 19:44:29,567 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 19:44:29,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:44:29,569 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:29,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:44:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 19:44:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-12-14 19:44:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-14 19:44:29,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 11 [2021-12-14 19:44:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-14 19:44:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:44:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-14 19:44:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:44:29,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:29,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:29,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:29,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:29,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1707085477, now seen corresponding path program 1 times [2021-12-14 19:44:29,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:29,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643325539] [2021-12-14 19:44:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:29,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:29,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:29,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 19:44:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:44:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:29,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:29,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643325539] [2021-12-14 19:44:29,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643325539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:29,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:29,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:44:29,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838121953] [2021-12-14 19:44:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:29,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:44:29,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:29,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:44:29,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:29,931 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:29,946 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-12-14 19:44:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:44:29,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-12-14 19:44:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:29,948 INFO L225 Difference]: With dead ends: 25 [2021-12-14 19:44:29,948 INFO L226 Difference]: Without dead ends: 25 [2021-12-14 19:44:29,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:29,953 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:29,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 78 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:44:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-14 19:44:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-14 19:44:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-14 19:44:29,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2021-12-14 19:44:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:29,963 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-14 19:44:29,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-14 19:44:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:44:29,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:29,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:29,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:30,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:30,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1380042284, now seen corresponding path program 1 times [2021-12-14 19:44:30,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:30,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181783107] [2021-12-14 19:44:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:30,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:30,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:30,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 19:44:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:44:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:30,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:30,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:30,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181783107] [2021-12-14 19:44:30,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181783107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:30,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:30,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:44:30,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38085465] [2021-12-14 19:44:30,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:30,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:44:30,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:44:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:44:30,612 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:30,630 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-14 19:44:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:44:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2021-12-14 19:44:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:30,633 INFO L225 Difference]: With dead ends: 42 [2021-12-14 19:44:30,633 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 19:44:30,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:44:30,636 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:30,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-14 19:44:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 19:44:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-14 19:44:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 19:44:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-14 19:44:30,648 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2021-12-14 19:44:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:30,648 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-14 19:44:30,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-14 19:44:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:44:30,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:30,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:30,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:30,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:30,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1408671435, now seen corresponding path program 1 times [2021-12-14 19:44:30,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998835727] [2021-12-14 19:44:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:30,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:30,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:30,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:30,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 19:44:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:44:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:30,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:30,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:30,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998835727] [2021-12-14 19:44:30,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998835727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:30,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:30,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:44:30,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100507586] [2021-12-14 19:44:30,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:30,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:44:30,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:44:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:44:30,969 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:31,025 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-14 19:44:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:44:31,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-14 19:44:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:31,027 INFO L225 Difference]: With dead ends: 58 [2021-12-14 19:44:31,027 INFO L226 Difference]: Without dead ends: 58 [2021-12-14 19:44:31,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:44:31,028 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:31,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:44:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-14 19:44:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-12-14 19:44:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 19:44:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-12-14 19:44:31,033 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 17 [2021-12-14 19:44:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:31,033 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-12-14 19:44:31,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-12-14 19:44:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:44:31,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:31,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:31,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:31,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1086639277, now seen corresponding path program 2 times [2021-12-14 19:44:31,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:31,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225584951] [2021-12-14 19:44:31,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:44:31,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:31,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:31,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:31,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 19:44:31,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:44:31,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:44:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:44:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:31,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:31,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:31,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225584951] [2021-12-14 19:44:31,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225584951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:31,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:31,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:44:31,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691544039] [2021-12-14 19:44:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:31,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:44:31,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:44:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:44:31,340 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:31,383 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-12-14 19:44:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:44:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-14 19:44:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:31,384 INFO L225 Difference]: With dead ends: 57 [2021-12-14 19:44:31,384 INFO L226 Difference]: Without dead ends: 57 [2021-12-14 19:44:31,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:44:31,385 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:31,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:44:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-14 19:44:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2021-12-14 19:44:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:44:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-14 19:44:31,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 17 [2021-12-14 19:44:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-14 19:44:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-14 19:44:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:44:31,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:31,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:31,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:31,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:31,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash -168362105, now seen corresponding path program 1 times [2021-12-14 19:44:31,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766394562] [2021-12-14 19:44:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:31,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:31,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:31,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 19:44:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:44:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:44:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:31,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:31,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766394562] [2021-12-14 19:44:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766394562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:31,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:44:31,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:44:31,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919561548] [2021-12-14 19:44:31,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:31,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:44:31,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:44:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:31,685 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:31,714 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-12-14 19:44:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:44:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-14 19:44:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:31,715 INFO L225 Difference]: With dead ends: 35 [2021-12-14 19:44:31,715 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 19:44:31,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:31,716 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:31,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:44:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 19:44:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-12-14 19:44:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-14 19:44:31,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2021-12-14 19:44:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:31,718 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-14 19:44:31,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:44:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-14 19:44:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:44:31,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:31,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:31,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:31,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:31,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash -924257906, now seen corresponding path program 1 times [2021-12-14 19:44:31,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:31,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098344775] [2021-12-14 19:44:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:31,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:31,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:31,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:31,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 19:44:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:44:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:32,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:32,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:32,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098344775] [2021-12-14 19:44:32,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098344775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:32,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:32,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-14 19:44:32,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767676490] [2021-12-14 19:44:32,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:32,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:44:32,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:44:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:32,261 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:32,296 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-12-14 19:44:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:44:32,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 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 19 [2021-12-14 19:44:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:32,299 INFO L225 Difference]: With dead ends: 26 [2021-12-14 19:44:32,299 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 19:44:32,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:32,300 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:32,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 63 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:44:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 19:44:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-14 19:44:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-14 19:44:32,302 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2021-12-14 19:44:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:32,302 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-14 19:44:32,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-14 19:44:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:44:32,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:32,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:32,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:32,519 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1412776041, now seen corresponding path program 1 times [2021-12-14 19:44:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:32,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738771162] [2021-12-14 19:44:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:32,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:32,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:32,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 19:44:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:44:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:32,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:32,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738771162] [2021-12-14 19:44:32,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738771162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:32,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:32,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-14 19:44:32,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023608481] [2021-12-14 19:44:32,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:32,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:44:32,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:44:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:44:32,994 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:44:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:33,087 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-12-14 19:44:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:44:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2021-12-14 19:44:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:33,088 INFO L225 Difference]: With dead ends: 46 [2021-12-14 19:44:33,088 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:44:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:44:33,089 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:33,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-14 19:44:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:44:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 25. [2021-12-14 19:44:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-14 19:44:33,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2021-12-14 19:44:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:33,092 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-14 19:44:33,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:44:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-14 19:44:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:44:33,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:33,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:33,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:33,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:33,307 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 846384368, now seen corresponding path program 1 times [2021-12-14 19:44:33,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160920025] [2021-12-14 19:44:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:33,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:33,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:33,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:33,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 19:44:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:44:33,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:44:33,459 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 19:44:33,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-14 19:44:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-14 19:44:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:33,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:35,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160920025] [2021-12-14 19:44:35,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160920025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:35,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:35,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-14 19:44:35,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317957843] [2021-12-14 19:44:35,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:44:35,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:44:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=1, NotChecked=0, Total=156 [2021-12-14 19:44:35,890 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:44:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:36,002 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-14 19:44:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:44:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-12-14 19:44:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:36,003 INFO L225 Difference]: With dead ends: 46 [2021-12-14 19:44:36,003 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:44:36,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2021-12-14 19:44:36,004 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:36,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-12-14 19:44:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:44:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-14 19:44:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 19:44:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-14 19:44:36,006 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 21 [2021-12-14 19:44:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:36,007 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-14 19:44:36,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:44:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-14 19:44:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:44:36,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:36,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:36,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:36,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:36,214 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash 649870863, now seen corresponding path program 1 times [2021-12-14 19:44:36,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:36,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180228195] [2021-12-14 19:44:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:36,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:36,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:36,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-14 19:44:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:44:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:36,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:44:36,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-14 19:44:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:36,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:44:36,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180228195] [2021-12-14 19:44:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180228195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:36,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:36,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-12-14 19:44:36,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086514995] [2021-12-14 19:44:36,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:36,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:44:36,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:44:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:44:36,647 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:44:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:36,725 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-12-14 19:44:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:44:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-12-14 19:44:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:36,726 INFO L225 Difference]: With dead ends: 52 [2021-12-14 19:44:36,726 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 19:44:36,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:44:36,727 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:36,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 104 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-12-14 19:44:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 19:44:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2021-12-14 19:44:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 19:44:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-12-14 19:44:36,730 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 21 [2021-12-14 19:44:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:36,731 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-12-14 19:44:36,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:44:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-12-14 19:44:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:44:36,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:36,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:36,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:36,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:36,939 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2095273231, now seen corresponding path program 2 times [2021-12-14 19:44:36,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:36,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252015049] [2021-12-14 19:44:36,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:44:36,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:36,949 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:37,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-14 19:44:37,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:44:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:44:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:44:37,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:37,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:37,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:37,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252015049] [2021-12-14 19:44:37,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252015049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:44:37,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:44:37,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-14 19:44:37,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467114607] [2021-12-14 19:44:37,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:44:37,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:44:37,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:37,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:44:37,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:37,111 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:37,283 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-14 19:44:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:44:37,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 21 [2021-12-14 19:44:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:37,284 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:44:37,284 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 19:44:37,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:44:37,285 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:37,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 116 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:44:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 19:44:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2021-12-14 19:44:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-14 19:44:37,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-12-14 19:44:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:37,287 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-14 19:44:37,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-14 19:44:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:44:37,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:37,288 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] [2021-12-14 19:44:37,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-14 19:44:37,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:37,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1626560659, now seen corresponding path program 1 times [2021-12-14 19:44:37,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:37,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833558417] [2021-12-14 19:44:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:37,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:37,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:37,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:37,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-14 19:44:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 19:44:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:40,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:44:47,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:44:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833558417] [2021-12-14 19:44:47,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833558417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:44:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189285197] [2021-12-14 19:44:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:47,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-14 19:44:47,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-14 19:44:47,272 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-14 19:44:47,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-12-14 19:44:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 19:44:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:44:58,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:44:58,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189285197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:44:58,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:44:58,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2021-12-14 19:44:58,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148241340] [2021-12-14 19:44:58,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:44:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:44:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:44:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:44:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=561, Unknown=7, NotChecked=0, Total=650 [2021-12-14 19:44:58,928 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:44:59,054 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-14 19:44:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:44:59,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-14 19:44:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:44:59,056 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:44:59,056 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 19:44:59,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=90, Invalid=659, Unknown=7, NotChecked=0, Total=756 [2021-12-14 19:44:59,056 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:44:59,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 61 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2021-12-14 19:44:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 19:44:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-12-14 19:44:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 19:44:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-14 19:44:59,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2021-12-14 19:44:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:44:59,059 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-14 19:44:59,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:44:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-14 19:44:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:44:59,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:44:59,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:44:59,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:59,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:44:59,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:44:59,466 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:44:59,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:44:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1755643378, now seen corresponding path program 1 times [2021-12-14 19:44:59,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:44:59,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135867699] [2021-12-14 19:44:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:44:59,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:44:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:44:59,470 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:44:59,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-14 19:44:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:44:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:44:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:44:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:44:59,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:45:00,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:45:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135867699] [2021-12-14 19:45:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135867699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:45:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1479371723] [2021-12-14 19:45:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:00,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-14 19:45:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-14 19:45:00,134 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-14 19:45:00,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-14 19:45:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:45:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:45:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:45:00,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:45:00,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1479371723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:45:00,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:45:00,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-12-14 19:45:00,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077384475] [2021-12-14 19:45:00,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:45:00,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:45:00,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:45:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:45:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:45:00,796 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:45:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:00,862 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-12-14 19:45:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:45:00,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 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 23 [2021-12-14 19:45:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:00,863 INFO L225 Difference]: With dead ends: 44 [2021-12-14 19:45:00,863 INFO L226 Difference]: Without dead ends: 24 [2021-12-14 19:45:00,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-12-14 19:45:00,863 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:00,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2021-12-14 19:45:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-14 19:45:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-14 19:45:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:45:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2021-12-14 19:45:00,865 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 23 [2021-12-14 19:45:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:00,865 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2021-12-14 19:45:00,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:45:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2021-12-14 19:45:00,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:45:00,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:00,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:00,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:45:01,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-14 19:45:01,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:45:01,275 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2021-12-14 19:45:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:01,276 INFO L85 PathProgramCache]: Analyzing trace with hash 782088788, now seen corresponding path program 2 times [2021-12-14 19:45:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:45:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697756111] [2021-12-14 19:45:01,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:45:01,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:45:01,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:45:01,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:45:01,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-14 19:45:01,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:45:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:45:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:45:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:45:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:45:01,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:45:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:45:01,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:45:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697756111] [2021-12-14 19:45:01,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697756111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:45:01,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:45:01,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-14 19:45:01,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322127486] [2021-12-14 19:45:01,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:45:01,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:45:01,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:45:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:45:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:45:01,412 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:45:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:01,433 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-12-14 19:45:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:45:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 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 23 [2021-12-14 19:45:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:01,434 INFO L225 Difference]: With dead ends: 19 [2021-12-14 19:45:01,434 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 19:45:01,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:45:01,434 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:01,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:45:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 19:45:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 19:45:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 19:45:01,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-12-14 19:45:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:01,436 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 19:45:01,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:45:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 19:45:01,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 19:45:01,438 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (6 of 7 remaining) [2021-12-14 19:45:01,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (5 of 7 remaining) [2021-12-14 19:45:01,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (4 of 7 remaining) [2021-12-14 19:45:01,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (3 of 7 remaining) [2021-12-14 19:45:01,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 7 remaining) [2021-12-14 19:45:01,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (1 of 7 remaining) [2021-12-14 19:45:01,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-12-14 19:45:01,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:45:01,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:45:01,648 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:01,649 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 19:45:01,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:45:01 BoogieIcfgContainer [2021-12-14 19:45:01,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 19:45:01,651 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 19:45:01,651 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 19:45:01,651 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 19:45:01,652 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:44:28" (3/4) ... [2021-12-14 19:45:01,654 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-14 19:45:01,658 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_malloc [2021-12-14 19:45:01,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-14 19:45:01,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-14 19:45:01,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-14 19:45:01,685 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 19:45:01,686 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 19:45:01,686 INFO L158 Benchmark]: Toolchain (without parser) took 33732.16ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 33.1MB in the beginning and 57.7MB in the end (delta: -24.6MB). Peak memory consumption was 1.1MB. Max. memory is 16.1GB. [2021-12-14 19:45:01,686 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 37.5MB in the beginning and 37.5MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:45:01,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 490.28ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 32.8MB in the beginning and 34.4MB in the end (delta: -1.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-12-14 19:45:01,687 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.78ms. Allocated memory is still 69.2MB. Free memory was 34.2MB in the beginning and 50.1MB in the end (delta: -15.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-14 19:45:01,687 INFO L158 Benchmark]: Boogie Preprocessor took 30.92ms. Allocated memory is still 69.2MB. Free memory was 49.9MB in the beginning and 48.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:45:01,687 INFO L158 Benchmark]: RCFGBuilder took 317.27ms. Allocated memory is still 69.2MB. Free memory was 48.7MB in the beginning and 38.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 19:45:01,688 INFO L158 Benchmark]: TraceAbstraction took 32796.91ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 37.8MB in the beginning and 60.2MB in the end (delta: -22.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:45:01,688 INFO L158 Benchmark]: Witness Printer took 35.15ms. Allocated memory is still 83.9MB. Free memory was 60.2MB in the beginning and 57.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:45:01,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 37.5MB in the beginning and 37.5MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 490.28ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 32.8MB in the beginning and 34.4MB in the end (delta: -1.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.78ms. Allocated memory is still 69.2MB. Free memory was 34.2MB in the beginning and 50.1MB in the end (delta: -15.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.92ms. Allocated memory is still 69.2MB. Free memory was 49.9MB in the beginning and 48.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 317.27ms. Allocated memory is still 69.2MB. Free memory was 48.7MB in the beginning and 38.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 32796.91ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 37.8MB in the beginning and 60.2MB in the end (delta: -22.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 35.15ms. Allocated memory is still 83.9MB. Free memory was 60.2MB in the beginning and 57.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 761]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 761]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 761]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 762]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 762]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 762]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 765]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 32.8s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 197 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 192 mSDsluCounter, 1172 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 266 IncrementalHoareTripleChecker+Unchecked, 818 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 494 IncrementalHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 354 mSDtfsCounter, 494 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 470 GetRequests, 336 SyntacticMatches, 22 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 22.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=5, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 130 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 26.9s InterpolantComputationTime, 324 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 426 ConstructedInterpolants, 94 QuantifiedInterpolants, 4026 SizeOfPredicates, 14 NumberOfNonLiveVariables, 983 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 54/84 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-14 19:45:01,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE