./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/20020406-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/memsafety/20020406-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:03:07,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:03:07,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:03:07,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:03:07,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:03:07,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:03:07,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:03:07,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:03:07,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:03:07,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:03:07,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:03:07,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:03:07,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:03:07,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:03:07,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:03:07,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:03:07,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:03:07,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:03:07,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:03:07,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:03:07,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:03:07,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:03:07,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:03:07,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:03:07,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:03:07,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:03:07,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:03:07,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:03:07,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:03:07,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:03:07,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:03:07,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:03:07,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:03:07,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:03:07,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:03:07,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:03:07,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:03:07,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:03:07,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:03:07,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:03:07,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:03:07,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:03:07,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:03:07,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:03:07,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:03:07,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:03:07,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:03:07,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:03:07,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:03:07,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:03:07,644 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:03:07,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:03:07,645 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:03:07,646 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:03:07,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:03:07,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:03:07,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:03:07,647 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:03:07,647 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:03:07,647 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:03:07,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:03:07,647 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:03:07,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:03:07,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:03:07,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:03:07,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:03:07,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:03:07,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:03:07,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:03:07,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:03:07,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:03:07,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:03:07,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:03:07,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2021-12-21 18:03:07,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:03:07,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:03:07,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:03:07,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:03:07,932 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:03:07,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2021-12-21 18:03:08,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd1185704/86dc36166ef948ae83ba798d2054106d/FLAG568538912 [2021-12-21 18:03:08,461 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:03:08,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2021-12-21 18:03:08,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd1185704/86dc36166ef948ae83ba798d2054106d/FLAG568538912 [2021-12-21 18:03:08,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd1185704/86dc36166ef948ae83ba798d2054106d [2021-12-21 18:03:08,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:03:08,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:03:08,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:03:08,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:03:08,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:03:08,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:03:08" (1/1) ... [2021-12-21 18:03:08,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7deff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:08, skipping insertion in model container [2021-12-21 18:03:08,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:03:08" (1/1) ... [2021-12-21 18:03:08,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:03:08,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:03:08,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:03:08,955 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) [2021-12-21 18:03:08,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6767c9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:08, skipping insertion in model container [2021-12-21 18:03:08,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:03:08,956 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 18:03:08,958 INFO L158 Benchmark]: Toolchain (without parser) took 460.13ms. Allocated memory is still 102.8MB. Free memory was 60.5MB in the beginning and 72.1MB in the end (delta: -11.6MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2021-12-21 18:03:08,958 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:03:08,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 457.67ms. Allocated memory is still 102.8MB. Free memory was 60.3MB in the beginning and 72.1MB in the end (delta: -11.8MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2021-12-21 18:03:08,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 457.67ms. Allocated memory is still 102.8MB. Free memory was 60.3MB in the beginning and 72.1MB in the end (delta: -11.8MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 897]: 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/memsafety/20020406-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:03:10,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:03:10,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:03:10,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:03:10,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:03:10,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:03:10,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:03:10,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:03:10,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:03:10,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:03:10,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:03:10,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:03:10,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:03:10,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:03:10,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:03:10,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:03:10,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:03:10,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:03:10,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:03:10,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:03:10,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:03:10,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:03:10,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:03:10,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:03:10,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:03:10,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:03:10,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:03:10,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:03:10,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:03:10,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:03:10,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:03:10,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:03:10,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:03:10,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:03:10,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:03:10,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:03:10,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:03:10,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:03:10,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:03:10,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:03:10,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:03:10,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:03:10,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:03:10,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:03:10,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:03:10,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:03:10,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:03:10,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:03:10,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:03:10,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:03:10,930 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:03:10,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:03:10,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:03:10,930 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:03:10,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:03:10,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:03:10,932 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:03:10,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:03:10,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:03:10,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:03:10,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:03:10,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:03:10,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:03:10,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:03:10,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:03:10,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:03:10,945 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:03:10,945 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:03:10,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:03:10,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:03:10,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2021-12-21 18:03:11,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:03:11,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:03:11,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:03:11,294 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:03:11,295 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:03:11,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2021-12-21 18:03:11,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/397ecc15a/a499158b6aa0413c97af504808fd3e1d/FLAGe96367399 [2021-12-21 18:03:12,020 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:03:12,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2021-12-21 18:03:12,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/397ecc15a/a499158b6aa0413c97af504808fd3e1d/FLAGe96367399 [2021-12-21 18:03:12,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/397ecc15a/a499158b6aa0413c97af504808fd3e1d [2021-12-21 18:03:12,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:03:12,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:03:12,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:03:12,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:03:12,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:03:12,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:03:12" (1/1) ... [2021-12-21 18:03:12,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec1f834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:12, skipping insertion in model container [2021-12-21 18:03:12,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:03:12" (1/1) ... [2021-12-21 18:03:12,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:03:12,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:03:12,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:03:12,816 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 18:03:12,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:03:12,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:03:12,890 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:03:12,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:03:13,035 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:03:13,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13 WrapperNode [2021-12-21 18:03:13,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:03:13,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:03:13,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:03:13,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:03:13,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,112 INFO L137 Inliner]: procedures = 286, calls = 76, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-21 18:03:13,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:03:13,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:03:13,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:03:13,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:03:13,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:03:13,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:03:13,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:03:13,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:03:13,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (1/1) ... [2021-12-21 18:03:13,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:03:13,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:03:13,209 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) [2021-12-21 18:03:13,212 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 [2021-12-21 18:03:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFdeg [2021-12-21 18:03:13,242 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFdeg [2021-12-21 18:03:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 18:03:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:03:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:03:13,243 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFnew [2021-12-21 18:03:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFnew [2021-12-21 18:03:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFfree [2021-12-21 18:03:13,245 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFfree [2021-12-21 18:03:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFshift_add [2021-12-21 18:03:13,245 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFshift_add [2021-12-21 18:03:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:03:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 18:03:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 18:03:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure FFmul [2021-12-21 18:03:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure FFmul [2021-12-21 18:03:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFexgcd [2021-12-21 18:03:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFexgcd [2021-12-21 18:03:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:03:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:03:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:03:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFswap [2021-12-21 18:03:13,247 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFswap [2021-12-21 18:03:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFcopy [2021-12-21 18:03:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFcopy [2021-12-21 18:03:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:03:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:03:13,449 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:03:13,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:03:14,182 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:03:14,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:03:14,192 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 18:03:14,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:03:14 BoogieIcfgContainer [2021-12-21 18:03:14,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:03:14,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:03:14,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:03:14,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:03:14,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:03:12" (1/3) ... [2021-12-21 18:03:14,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a16a439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:03:14, skipping insertion in model container [2021-12-21 18:03:14,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:03:13" (2/3) ... [2021-12-21 18:03:14,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a16a439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:03:14, skipping insertion in model container [2021-12-21 18:03:14,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:03:14" (3/3) ... [2021-12-21 18:03:14,203 INFO L111 eAbstractionObserver]: Analyzing ICFG 20020406-1.i [2021-12-21 18:03:14,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:03:14,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-12-21 18:03:14,255 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:03:14,262 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 [2021-12-21 18:03:14,262 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-12-21 18:03:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:03:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 18:03:14,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:14,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 18:03:14,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting DUPFFnewErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash 228226931, now seen corresponding path program 1 times [2021-12-21 18:03:14,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342709] [2021-12-21 18:03:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:14,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:14,309 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) [2021-12-21 18:03:14,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:03:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:03:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:14,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:14,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:14,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342709] [2021-12-21 18:03:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:14,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:14,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:03:14,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305321389] [2021-12-21 18:03:14,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:03:14,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:03:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:03:14,593 INFO L87 Difference]: Start difference. First operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:14,893 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2021-12-21 18:03:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:03:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 18:03:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:14,904 INFO L225 Difference]: With dead ends: 182 [2021-12-21 18:03:14,904 INFO L226 Difference]: Without dead ends: 180 [2021-12-21 18:03:14,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:03:14,908 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:14,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:03:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-21 18:03:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-12-21 18:03:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 87 states have (on average 1.6781609195402298) internal successors, (146), 139 states have internal predecessors, (146), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:03:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2021-12-21 18:03:14,953 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 5 [2021-12-21 18:03:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:14,953 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2021-12-21 18:03:14,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2021-12-21 18:03:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 18:03:14,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:14,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 18:03:14,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:15,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:15,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting DUPFFnewErr1REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash 228226932, now seen corresponding path program 1 times [2021-12-21 18:03:15,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:15,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409322013] [2021-12-21 18:03:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:15,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:15,167 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) [2021-12-21 18:03:15,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:03:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:15,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:03:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:15,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:15,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:15,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409322013] [2021-12-21 18:03:15,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409322013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:15,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:15,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:03:15,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146799917] [2021-12-21 18:03:15,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:15,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:03:15,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:03:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:03:15,313 INFO L87 Difference]: Start difference. First operand 180 states and 216 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:15,662 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2021-12-21 18:03:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:03:15,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 18:03:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:15,666 INFO L225 Difference]: With dead ends: 184 [2021-12-21 18:03:15,667 INFO L226 Difference]: Without dead ends: 184 [2021-12-21 18:03:15,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:03:15,668 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 6 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:15,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:03:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-21 18:03:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2021-12-21 18:03:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 89 states have (on average 1.651685393258427) internal successors, (147), 140 states have internal predecessors, (147), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:03:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2021-12-21 18:03:15,700 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 5 [2021-12-21 18:03:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:15,700 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2021-12-21 18:03:15,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2021-12-21 18:03:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:03:15,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:15,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:15,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-21 18:03:15,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:15,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting DUPFFnewErr3REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:15,910 INFO L85 PathProgramCache]: Analyzing trace with hash 282747829, now seen corresponding path program 1 times [2021-12-21 18:03:15,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876387488] [2021-12-21 18:03:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:15,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:15,912 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) [2021-12-21 18:03:15,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:03:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:03:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:16,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:16,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:16,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:03:16,076 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:03:16,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:03:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:16,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:16,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:16,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876387488] [2021-12-21 18:03:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876387488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:16,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:03:16,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617022443] [2021-12-21 18:03:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:03:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:03:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:03:16,117 INFO L87 Difference]: Start difference. First operand 181 states and 217 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:16,387 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2021-12-21 18:03:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:03:16,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:03:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:16,390 INFO L225 Difference]: With dead ends: 177 [2021-12-21 18:03:16,390 INFO L226 Difference]: Without dead ends: 177 [2021-12-21 18:03:16,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:03:16,391 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 33 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:16,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 342 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:03:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-21 18:03:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-12-21 18:03:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 87 states have (on average 1.6206896551724137) internal successors, (141), 134 states have internal predecessors, (141), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:03:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-12-21 18:03:16,403 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 7 [2021-12-21 18:03:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:16,403 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-12-21 18:03:16,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-12-21 18:03:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:03:16,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:16,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:16,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:16,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:16,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting DUPFFnewErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1865414411, now seen corresponding path program 1 times [2021-12-21 18:03:16,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:16,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935755500] [2021-12-21 18:03:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:16,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:16,623 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) [2021-12-21 18:03:16,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:03:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:03:16,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:16,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:16,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:16,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-21 18:03:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:16,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:16,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935755500] [2021-12-21 18:03:16,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935755500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:16,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:16,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:03:16,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137839249] [2021-12-21 18:03:16,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:16,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:03:16,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:03:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:03:16,826 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:17,363 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2021-12-21 18:03:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:03:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 18:03:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:17,368 INFO L225 Difference]: With dead ends: 186 [2021-12-21 18:03:17,368 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 18:03:17,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:03:17,369 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 28 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:17,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 811 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:03:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 18:03:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2021-12-21 18:03:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 133 states have internal predecessors, (140), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:03:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2021-12-21 18:03:17,379 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 11 [2021-12-21 18:03:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:17,379 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2021-12-21 18:03:17,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2021-12-21 18:03:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 18:03:17,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:17,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:17,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:17,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:17,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1993271845, now seen corresponding path program 1 times [2021-12-21 18:03:17,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:17,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695303061] [2021-12-21 18:03:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:17,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:17,599 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) [2021-12-21 18:03:17,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:03:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:17,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:03:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:17,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 18:03:17,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:17,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:17,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-21 18:03:17,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:03:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:17,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:17,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:17,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695303061] [2021-12-21 18:03:17,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695303061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:17,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:17,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:03:17,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585952116] [2021-12-21 18:03:17,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:17,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:03:17,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:03:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:03:17,858 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:18,646 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2021-12-21 18:03:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:03:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 18:03:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:18,649 INFO L225 Difference]: With dead ends: 197 [2021-12-21 18:03:18,649 INFO L226 Difference]: Without dead ends: 197 [2021-12-21 18:03:18,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:03:18,650 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:18,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1053 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 18:03:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-21 18:03:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2021-12-21 18:03:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 102 states have (on average 1.5294117647058822) internal successors, (156), 148 states have internal predecessors, (156), 35 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:03:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2021-12-21 18:03:18,657 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 12 [2021-12-21 18:03:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2021-12-21 18:03:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2021-12-21 18:03:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 18:03:18,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:18,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:18,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:18,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:18,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash 335042805, now seen corresponding path program 1 times [2021-12-21 18:03:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030483021] [2021-12-21 18:03:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:18,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:18,868 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) [2021-12-21 18:03:18,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:03:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:03:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:19,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:19,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:19,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030483021] [2021-12-21 18:03:19,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030483021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:19,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:19,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:03:19,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210899142] [2021-12-21 18:03:19,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:19,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:03:19,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:03:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:03:19,068 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:03:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:19,237 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2021-12-21 18:03:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:03:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-21 18:03:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:19,240 INFO L225 Difference]: With dead ends: 209 [2021-12-21 18:03:19,240 INFO L226 Difference]: Without dead ends: 203 [2021-12-21 18:03:19,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:03:19,241 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 43 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:19,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 757 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:03:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-21 18:03:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2021-12-21 18:03:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 109 states have (on average 1.5045871559633028) internal successors, (164), 156 states have internal predecessors, (164), 35 states have call successors, (35), 9 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-12-21 18:03:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2021-12-21 18:03:19,249 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 21 [2021-12-21 18:03:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:19,249 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2021-12-21 18:03:19,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:03:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2021-12-21 18:03:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:03:19,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:19,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:19,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:19,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:19,472 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 370721495, now seen corresponding path program 1 times [2021-12-21 18:03:19,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661577121] [2021-12-21 18:03:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:19,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:19,475 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) [2021-12-21 18:03:19,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:03:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:03:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:19,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:03:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:19,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661577121] [2021-12-21 18:03:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661577121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:03:19,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:03:19,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-21 18:03:19,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265736034] [2021-12-21 18:03:19,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:03:19,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:03:19,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:03:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:03:19,962 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:03:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:20,465 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2021-12-21 18:03:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:03:20,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-21 18:03:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:20,467 INFO L225 Difference]: With dead ends: 246 [2021-12-21 18:03:20,467 INFO L226 Difference]: Without dead ends: 234 [2021-12-21 18:03:20,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:03:20,468 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 153 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:20,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1351 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:03:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-21 18:03:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2021-12-21 18:03:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.4960629921259843) internal successors, (190), 173 states have internal predecessors, (190), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-12-21 18:03:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 264 transitions. [2021-12-21 18:03:20,475 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 264 transitions. Word has length 22 [2021-12-21 18:03:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:20,476 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 264 transitions. [2021-12-21 18:03:20,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:03:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 264 transitions. [2021-12-21 18:03:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:03:20,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:20,477 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:20,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:20,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:20,686 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:20,686 INFO L85 PathProgramCache]: Analyzing trace with hash -843792011, now seen corresponding path program 2 times [2021-12-21 18:03:20,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:20,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979208535] [2021-12-21 18:03:20,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:03:20,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:20,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:20,705 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) [2021-12-21 18:03:20,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:03:20,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 18:03:20,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:03:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:03:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:03:20,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:20,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979208535] [2021-12-21 18:03:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979208535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:20,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:20,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:03:20,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211986398] [2021-12-21 18:03:20,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:20,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:03:20,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:20,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:03:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:03:20,892 INFO L87 Difference]: Start difference. First operand 216 states and 264 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:03:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:21,279 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2021-12-21 18:03:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:03:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-21 18:03:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:21,281 INFO L225 Difference]: With dead ends: 214 [2021-12-21 18:03:21,281 INFO L226 Difference]: Without dead ends: 214 [2021-12-21 18:03:21,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:03:21,282 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 23 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:21,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 757 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:03:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-21 18:03:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-12-21 18:03:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 127 states have (on average 1.4803149606299213) internal successors, (188), 171 states have internal predecessors, (188), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-12-21 18:03:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2021-12-21 18:03:21,290 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 25 [2021-12-21 18:03:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:21,290 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2021-12-21 18:03:21,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:03:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2021-12-21 18:03:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:03:21,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:21,291 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:21,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-21 18:03:21,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:21,502 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:21,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash -843792010, now seen corresponding path program 1 times [2021-12-21 18:03:21,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:21,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635474272] [2021-12-21 18:03:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:21,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:21,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:21,504 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) [2021-12-21 18:03:21,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:03:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:03:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:21,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:03:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:03:22,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:22,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635474272] [2021-12-21 18:03:22,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635474272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:03:22,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:03:22,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-21 18:03:22,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691684913] [2021-12-21 18:03:22,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:03:22,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:03:22,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:03:22,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:03:22,239 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:03:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:23,499 INFO L93 Difference]: Finished difference Result 285 states and 358 transitions. [2021-12-21 18:03:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 18:03:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-21 18:03:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:23,501 INFO L225 Difference]: With dead ends: 285 [2021-12-21 18:03:23,501 INFO L226 Difference]: Without dead ends: 267 [2021-12-21 18:03:23,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 18:03:23,503 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 231 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:23,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1817 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 18:03:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-21 18:03:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 222. [2021-12-21 18:03:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 134 states have (on average 1.4402985074626866) internal successors, (193), 179 states have internal predecessors, (193), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-21 18:03:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 268 transitions. [2021-12-21 18:03:23,512 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 268 transitions. Word has length 25 [2021-12-21 18:03:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:23,527 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 268 transitions. [2021-12-21 18:03:23,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:03:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 268 transitions. [2021-12-21 18:03:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:03:23,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:23,528 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:23,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:23,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:23,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 168356342, now seen corresponding path program 2 times [2021-12-21 18:03:23,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:23,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445919629] [2021-12-21 18:03:23,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:03:23,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:23,742 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) [2021-12-21 18:03:23,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:03:23,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 18:03:23,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:03:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:03:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 18:03:24,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:03:24,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445919629] [2021-12-21 18:03:24,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445919629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:03:24,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:03:24,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:03:24,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393801496] [2021-12-21 18:03:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:03:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:03:24,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:24,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:03:24,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:03:24,013 INFO L87 Difference]: Start difference. First operand 222 states and 268 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:03:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:24,413 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2021-12-21 18:03:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:03:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-21 18:03:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:24,415 INFO L225 Difference]: With dead ends: 220 [2021-12-21 18:03:24,416 INFO L226 Difference]: Without dead ends: 220 [2021-12-21 18:03:24,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:03:24,416 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:24,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 810 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:03:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-21 18:03:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-12-21 18:03:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 134 states have (on average 1.4253731343283582) internal successors, (191), 177 states have internal predecessors, (191), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-21 18:03:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 266 transitions. [2021-12-21 18:03:24,422 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 266 transitions. Word has length 29 [2021-12-21 18:03:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:24,423 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 266 transitions. [2021-12-21 18:03:24,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:03:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 266 transitions. [2021-12-21 18:03:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:03:24,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:24,425 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:24,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:24,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:24,636 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash 924079462, now seen corresponding path program 1 times [2021-12-21 18:03:24,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594237198] [2021-12-21 18:03:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:24,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:24,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:24,640 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) [2021-12-21 18:03:24,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:03:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 18:03:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:24,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:24,928 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 18:03:24,928 INFO L387 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 17 treesize of output 24 [2021-12-21 18:03:24,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:25,079 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,110 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,135 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,159 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,182 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,207 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,232 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-21 18:03:25,261 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:25,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-12-21 18:03:25,370 INFO L353 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2021-12-21 18:03:25,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 53 [2021-12-21 18:03:25,460 INFO L353 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-12-21 18:03:25,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 55 [2021-12-21 18:03:25,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-21 18:03:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 18:03:25,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:03:27,500 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse0) v_ArrVal_552) |c_DUPFFnew_~ans~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2021-12-21 18:03:27,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:03:27,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-21 18:03:27,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-12-21 18:03:27,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 18:03:31,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:03:31,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594237198] [2021-12-21 18:03:31,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594237198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:03:31,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:03:31,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-21 18:03:31,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400164340] [2021-12-21 18:03:31,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:03:31,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:03:31,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:03:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:03:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=4, NotChecked=36, Total=420 [2021-12-21 18:03:31,622 INFO L87 Difference]: Start difference. First operand 220 states and 266 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:03:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:32,706 INFO L93 Difference]: Finished difference Result 219 states and 265 transitions. [2021-12-21 18:03:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:03:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-21 18:03:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:32,708 INFO L225 Difference]: With dead ends: 219 [2021-12-21 18:03:32,708 INFO L226 Difference]: Without dead ends: 219 [2021-12-21 18:03:32,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=4, NotChecked=44, Total=600 [2021-12-21 18:03:32,708 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 34 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:32,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 2140 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 497 Invalid, 0 Unknown, 407 Unchecked, 0.9s Time] [2021-12-21 18:03:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-21 18:03:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-12-21 18:03:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 134 states have (on average 1.4179104477611941) internal successors, (190), 176 states have internal predecessors, (190), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-21 18:03:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2021-12-21 18:03:32,714 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 30 [2021-12-21 18:03:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:32,714 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2021-12-21 18:03:32,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:03:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2021-12-21 18:03:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:03:32,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:32,719 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:32,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:32,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:32,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:03:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash 924079463, now seen corresponding path program 1 times [2021-12-21 18:03:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523965857] [2021-12-21 18:03:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:03:32,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:32,929 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) [2021-12-21 18:03:32,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:03:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:03:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 18:03:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:33,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:03:33,209 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:03:33,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:03:33,218 INFO L387 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 10 treesize of output 9 [2021-12-21 18:03:33,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:33,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:03:33,450 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:03:33,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-21 18:03:33,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-21 18:03:33,481 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,530 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:03:33,565 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:03:33,601 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:03:33,638 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:03:33,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-21 18:03:33,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-21 18:03:33,673 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,716 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:03:33,764 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-12-21 18:03:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:03:33,805 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:03:33,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-12-21 18:03:33,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-21 18:03:33,926 INFO L353 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2021-12-21 18:03:33,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2021-12-21 18:03:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:33,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 57 [2021-12-21 18:03:34,047 INFO L353 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-12-21 18:03:34,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2021-12-21 18:03:34,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:03:34,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2021-12-21 18:03:34,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-21 18:03:34,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:03:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 18:03:34,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:02,202 WARN L227 SmtUtils]: Spent 27.79s on a formula simplification that was a NOOP. DAG size: 194 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-12-21 18:04:07,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:04:07,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2021-12-21 18:04:07,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2021-12-21 18:04:07,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-21 18:04:07,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:04:07,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-12-21 18:04:07,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:04:07,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-12-21 18:04:07,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:04:08,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-21 18:04:08,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:04:08,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-21 18:04:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 18:04:08,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523965857] [2021-12-21 18:04:08,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523965857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:08,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:08,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-21 18:04:08,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034563030] [2021-12-21 18:04:08,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:08,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:04:08,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:04:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=359, Unknown=6, NotChecked=0, Total=420 [2021-12-21 18:04:08,244 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:11,492 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2021-12-21 18:04:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:04:11,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-21 18:04:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:11,494 INFO L225 Difference]: With dead ends: 220 [2021-12-21 18:04:11,494 INFO L226 Difference]: Without dead ends: 220 [2021-12-21 18:04:11,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=106, Invalid=644, Unknown=6, NotChecked=0, Total=756 [2021-12-21 18:04:11,495 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 27 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:11,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2102 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 761 Invalid, 0 Unknown, 287 Unchecked, 2.3s Time] [2021-12-21 18:04:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-21 18:04:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2021-12-21 18:04:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 134 states have (on average 1.4104477611940298) internal successors, (189), 175 states have internal predecessors, (189), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-21 18:04:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 264 transitions. [2021-12-21 18:04:11,500 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 264 transitions. Word has length 30 [2021-12-21 18:04:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:11,500 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 264 transitions. [2021-12-21 18:04:11,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 264 transitions. [2021-12-21 18:04:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:04:11,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:11,500 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:11,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:11,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:11,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:04:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2092985884, now seen corresponding path program 1 times [2021-12-21 18:04:11,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426940044] [2021-12-21 18:04:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:11,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:11,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:11,709 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) [2021-12-21 18:04:11,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:04:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:04:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:11,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 18:04:11,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:04:11,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:04:12,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-21 18:04:12,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:04:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 18:04:12,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:12,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:12,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426940044] [2021-12-21 18:04:12,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426940044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:12,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:12,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:04:12,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981446305] [2021-12-21 18:04:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:12,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:04:12,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:12,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:04:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:04:12,059 INFO L87 Difference]: Start difference. First operand 218 states and 264 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:04:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:12,523 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2021-12-21 18:04:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:04:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-12-21 18:04:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:12,525 INFO L225 Difference]: With dead ends: 230 [2021-12-21 18:04:12,525 INFO L226 Difference]: Without dead ends: 218 [2021-12-21 18:04:12,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:04:12,526 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 58 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:12,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 753 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:04:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-21 18:04:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2021-12-21 18:04:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 130 states have (on average 1.376923076923077) internal successors, (179), 170 states have internal predecessors, (179), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:04:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2021-12-21 18:04:12,532 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 42 [2021-12-21 18:04:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:12,533 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2021-12-21 18:04:12,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:04:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2021-12-21 18:04:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:04:12,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:12,534 INFO L514 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:12,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:12,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:12,744 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:04:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash -562772518, now seen corresponding path program 1 times [2021-12-21 18:04:12,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:12,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002731712] [2021-12-21 18:04:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:12,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:12,746 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:04:12,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 18:04:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:13,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:04:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-21 18:04:13,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-21 18:04:13,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:13,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002731712] [2021-12-21 18:04:13,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002731712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:13,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:13,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-21 18:04:13,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183199254] [2021-12-21 18:04:13,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:13,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:04:13,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:04:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:04:13,673 INFO L87 Difference]: Start difference. First operand 213 states and 249 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:04:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:15,288 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2021-12-21 18:04:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 18:04:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-12-21 18:04:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:15,290 INFO L225 Difference]: With dead ends: 291 [2021-12-21 18:04:15,290 INFO L226 Difference]: Without dead ends: 279 [2021-12-21 18:04:15,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=641, Invalid=1521, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 18:04:15,291 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 239 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:15,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 2177 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 18:04:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-21 18:04:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 220. [2021-12-21 18:04:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 177 states have internal predecessors, (186), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:04:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2021-12-21 18:04:15,301 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 56 [2021-12-21 18:04:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:15,302 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2021-12-21 18:04:15,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:04:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2021-12-21 18:04:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 18:04:15,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:15,304 INFO L514 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:15,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:15,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:15,517 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:04:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093162, now seen corresponding path program 2 times [2021-12-21 18:04:15,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638188866] [2021-12-21 18:04:15,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:04:15,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:15,519 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) [2021-12-21 18:04:15,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 18:04:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 18:04:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:04:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:04:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-21 18:04:15,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:15,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638188866] [2021-12-21 18:04:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638188866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:15,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:15,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:04:15,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317401538] [2021-12-21 18:04:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:15,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:04:15,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:04:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:04:15,763 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-21 18:04:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:16,149 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2021-12-21 18:04:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:04:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 63 [2021-12-21 18:04:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:16,150 INFO L225 Difference]: With dead ends: 218 [2021-12-21 18:04:16,150 INFO L226 Difference]: Without dead ends: 218 [2021-12-21 18:04:16,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:04:16,151 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:16,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 738 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:04:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-21 18:04:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-12-21 18:04:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 175 states have internal predecessors, (184), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 18:04:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2021-12-21 18:04:16,156 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 63 [2021-12-21 18:04:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:16,156 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2021-12-21 18:04:16,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-21 18:04:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2021-12-21 18:04:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 18:04:16,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:16,158 INFO L514 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:16,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:16,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:16,365 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-21 18:04:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:16,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093161, now seen corresponding path program 1 times [2021-12-21 18:04:16,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:16,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919330466] [2021-12-21 18:04:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:16,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:16,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:16,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:04:16,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 18:04:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:16,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:04:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-21 18:04:16,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:16,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:16,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919330466] [2021-12-21 18:04:16,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919330466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:16,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:16,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:04:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155840975] [2021-12-21 18:04:16,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:16,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:04:16,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:04:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:04:16,878 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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)