./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:25:03,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:25:03,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:25:03,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:25:03,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:25:03,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:25:03,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:25:03,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:25:03,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:25:03,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:25:03,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:25:03,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:25:03,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:25:03,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:25:03,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:25:03,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:25:03,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:25:03,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:25:03,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:25:03,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:25:03,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:25:03,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:25:03,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:25:03,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:25:03,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:25:03,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:25:03,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:25:03,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:25:03,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:25:03,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:25:03,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:25:03,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:25:03,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:25:03,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:25:03,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:25:03,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:25:03,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:25:03,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:25:03,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:25:03,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:25:03,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:25:03,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:25:03,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:25:03,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:25:03,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:25:03,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:25:03,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:25:03,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:25:03,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:25:03,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:25:03,872 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:25:03,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:25:03,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:25:03,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:25:03,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:25:03,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:25:03,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:25:03,874 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:25:03,874 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:25:03,874 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:25:03,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:25:03,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:25:03,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:25:03,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:25:03,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:25:03,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:25:03,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:25:03,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:25:03,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:25:03,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:25:03,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:25:03,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:25:03,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:25:03,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-12-22 16:25:04,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:25:04,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:25:04,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:25:04,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:25:04,114 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:25:04,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-22 16:25:04,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a461634f3/9dd259f2439942df9d9aa63bc9264303/FLAG7e4ef4fd7 [2021-12-22 16:25:04,630 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:25:04,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-22 16:25:04,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a461634f3/9dd259f2439942df9d9aa63bc9264303/FLAG7e4ef4fd7 [2021-12-22 16:25:04,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a461634f3/9dd259f2439942df9d9aa63bc9264303 [2021-12-22 16:25:04,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:25:04,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:25:04,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:25:04,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:25:04,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:25:04,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:04" (1/1) ... [2021-12-22 16:25:04,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320191c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:04, skipping insertion in model container [2021-12-22 16:25:04,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:04" (1/1) ... [2021-12-22 16:25:04,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:25:04,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:25:04,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:25:04,960 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-22 16:25:04,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29526fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:04, skipping insertion in model container [2021-12-22 16:25:04,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:25:04,963 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 16:25:04,965 INFO L158 Benchmark]: Toolchain (without parser) took 301.30ms. Allocated memory is still 90.2MB. Free memory was 58.3MB in the beginning and 65.7MB in the end (delta: -7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:25:04,967 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 90.2MB. Free memory was 47.7MB in the beginning and 47.7MB in the end (delta: 34.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:25:04,968 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.40ms. Allocated memory is still 90.2MB. Free memory was 58.1MB in the beginning and 65.7MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:25:04,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 90.2MB. Free memory was 47.7MB in the beginning and 47.7MB in the end (delta: 34.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.40ms. Allocated memory is still 90.2MB. Free memory was 58.1MB in the beginning and 65.7MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: 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/array-memsafety/bubblesort-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:25:06,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:25:06,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:25:06,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:25:06,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:25:06,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:25:06,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:25:06,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:25:06,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:25:06,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:25:06,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:25:06,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:25:06,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:25:06,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:25:06,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:25:06,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:25:06,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:25:06,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:25:06,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:25:06,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:25:06,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:25:06,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:25:06,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:25:06,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:25:06,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:25:06,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:25:06,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:25:06,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:25:06,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:25:06,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:25:06,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:25:06,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:25:06,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:25:06,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:25:06,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:25:06,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:25:06,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:25:06,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:25:06,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:25:06,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:25:06,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:25:06,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 16:25:06,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:25:06,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:25:06,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:25:06,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:25:06,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:25:06,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:25:06,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:25:06,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:25:06,887 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:25:06,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:25:06,888 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:25:06,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:25:06,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:25:06,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:25:06,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:25:06,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:25:06,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:25:06,890 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:25:06,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:25:06,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:25:06,890 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 16:25:06,890 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 16:25:06,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:25:06,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:25:06,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:25:06,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:25:06,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:25:06,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:25:06,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:25:06,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:25:06,892 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 16:25:06,892 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 16:25:06,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:25:06,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 16:25:06,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-12-22 16:25:07,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:25:07,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:25:07,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:25:07,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:25:07,220 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:25:07,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-22 16:25:07,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb42d4d6d/285575b563fc43769388ed648b70f7c1/FLAG2cb67f2f4 [2021-12-22 16:25:07,684 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:25:07,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-22 16:25:07,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb42d4d6d/285575b563fc43769388ed648b70f7c1/FLAG2cb67f2f4 [2021-12-22 16:25:08,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb42d4d6d/285575b563fc43769388ed648b70f7c1 [2021-12-22 16:25:08,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:25:08,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:25:08,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:25:08,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:25:08,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:25:08,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af4721f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08, skipping insertion in model container [2021-12-22 16:25:08,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:25:08,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:25:08,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:25:08,496 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 16:25:08,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:25:08,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:25:08,571 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:25:08,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:25:08,648 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:25:08,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08 WrapperNode [2021-12-22 16:25:08,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:25:08,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:25:08,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:25:08,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:25:08,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,719 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-22 16:25:08,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:25:08,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:25:08,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:25:08,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:25:08,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:25:08,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:25:08,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:25:08,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:25:08,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (1/1) ... [2021-12-22 16:25:08,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:25:08,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:25:08,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 16:25:08,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 16:25:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 16:25:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:25:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:25:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 16:25:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:25:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:25:08,954 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:25:08,956 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:25:09,297 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:25:09,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:25:09,303 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 16:25:09,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:09 BoogieIcfgContainer [2021-12-22 16:25:09,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:25:09,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:25:09,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:25:09,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:25:09,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:25:08" (1/3) ... [2021-12-22 16:25:09,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee37dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:25:09, skipping insertion in model container [2021-12-22 16:25:09,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:08" (2/3) ... [2021-12-22 16:25:09,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee37dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:25:09, skipping insertion in model container [2021-12-22 16:25:09,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:09" (3/3) ... [2021-12-22 16:25:09,313 INFO L111 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca-2.i [2021-12-22 16:25:09,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:25:09,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-22 16:25:09,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:25:09,372 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 16:25:09,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-22 16:25:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:09,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:09,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:09,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-22 16:25:09,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:09,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763891888] [2021-12-22 16:25:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:09,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:09,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:09,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:09,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 16:25:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:25:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:09,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:25:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:09,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:09,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763891888] [2021-12-22 16:25:09,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763891888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:09,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:25:09,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148716138] [2021-12-22 16:25:09,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:09,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:25:09,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:09,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:25:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:25:09,656 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:09,756 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-22 16:25:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:25:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:09,763 INFO L225 Difference]: With dead ends: 40 [2021-12-22 16:25:09,763 INFO L226 Difference]: Without dead ends: 38 [2021-12-22 16:25:09,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:25:09,767 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:09,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:25:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-22 16:25:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-22 16:25:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-22 16:25:09,808 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-12-22 16:25:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:09,808 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-22 16:25:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-22 16:25:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:09,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:09,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:09,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:10,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:10,014 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-22 16:25:10,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:10,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929861623] [2021-12-22 16:25:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:10,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:10,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:10,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 16:25:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:25:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:10,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:25:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:10,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:10,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:10,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929861623] [2021-12-22 16:25:10,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929861623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:10,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:10,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:25:10,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686828415] [2021-12-22 16:25:10,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:25:10,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:25:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:10,156 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:10,455 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-12-22 16:25:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:25:10,456 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:10,457 INFO L225 Difference]: With dead ends: 77 [2021-12-22 16:25:10,457 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 16:25:10,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:10,458 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:10,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 145 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:25:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 16:25:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2021-12-22 16:25:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-22 16:25:10,466 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2021-12-22 16:25:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:10,466 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-22 16:25:10,466 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-22 16:25:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:10,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:10,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:10,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:10,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:10,676 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-22 16:25:10,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:10,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881935706] [2021-12-22 16:25:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:10,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:10,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:10,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 16:25:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:25:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:10,784 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 8 treesize of output 7 [2021-12-22 16:25:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:10,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:10,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881935706] [2021-12-22 16:25:10,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881935706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:10,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:10,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:25:10,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274395818] [2021-12-22 16:25:10,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:10,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:25:10,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:10,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:25:10,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:10,853 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:10,882 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-22 16:25:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:10,884 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:10,885 INFO L225 Difference]: With dead ends: 43 [2021-12-22 16:25:10,886 INFO L226 Difference]: Without dead ends: 43 [2021-12-22 16:25:10,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:10,887 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:10,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-22 16:25:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-22 16:25:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-12-22 16:25:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-22 16:25:10,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-12-22 16:25:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:10,894 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-22 16:25:10,894 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-22 16:25:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:25:10,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:10,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:10,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:11,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:11,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-12-22 16:25:11,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:11,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085400942] [2021-12-22 16:25:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:11,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:11,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:11,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 16:25:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:25:11,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:11,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:11,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:11,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085400942] [2021-12-22 16:25:11,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085400942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:11,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:11,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:11,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028622593] [2021-12-22 16:25:11,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:11,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:25:11,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:11,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:25:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:11,245 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:11,304 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-12-22 16:25:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:25:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:25:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:11,307 INFO L225 Difference]: With dead ends: 67 [2021-12-22 16:25:11,308 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 16:25:11,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:11,310 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:11,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 68 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 16:25:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-12-22 16:25:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-22 16:25:11,318 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 9 [2021-12-22 16:25:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:11,319 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-22 16:25:11,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-22 16:25:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:25:11,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:11,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:11,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:11,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:11,526 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052884, now seen corresponding path program 1 times [2021-12-22 16:25:11,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449168850] [2021-12-22 16:25:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:11,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:11,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:11,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:11,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 16:25:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:25:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:11,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:25:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:11,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:11,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:11,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449168850] [2021-12-22 16:25:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449168850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:11,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:11,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:25:11,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741791139] [2021-12-22 16:25:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:11,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:25:11,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:25:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:11,587 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:11,718 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-22 16:25:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:25:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:25:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:11,719 INFO L225 Difference]: With dead ends: 37 [2021-12-22 16:25:11,720 INFO L226 Difference]: Without dead ends: 37 [2021-12-22 16:25:11,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:11,721 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:11,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:25:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-22 16:25:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-22 16:25:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-22 16:25:11,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2021-12-22 16:25:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:11,724 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-22 16:25:11,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-22 16:25:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:25:11,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:11,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:11,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:11,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:11,926 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052885, now seen corresponding path program 1 times [2021-12-22 16:25:11,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:11,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266696148] [2021-12-22 16:25:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:11,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:11,934 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:11,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 16:25:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:25:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:12,004 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 8 treesize of output 7 [2021-12-22 16:25:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:12,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266696148] [2021-12-22 16:25:12,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266696148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:12,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:12,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:25:12,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792868907] [2021-12-22 16:25:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:25:12,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:25:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:25:12,145 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,168 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-22 16:25:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:25:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:25:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,169 INFO L225 Difference]: With dead ends: 41 [2021-12-22 16:25:12,169 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 16:25:12,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:25:12,170 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2021-12-22 16:25:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 16:25:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-22 16:25:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-22 16:25:12,174 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 9 [2021-12-22 16:25:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,175 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-22 16:25:12,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-22 16:25:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:25:12,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,176 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:12,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:12,384 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-22 16:25:12,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:12,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437691617] [2021-12-22 16:25:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:12,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:12,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 16:25:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:25:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437691617] [2021-12-22 16:25:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437691617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:12,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:12,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:25:12,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286467211] [2021-12-22 16:25:12,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:25:12,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:25:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:25:12,538 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,585 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-12-22 16:25:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:25:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:25:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,588 INFO L225 Difference]: With dead ends: 69 [2021-12-22 16:25:12,588 INFO L226 Difference]: Without dead ends: 69 [2021-12-22 16:25:12,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:25:12,589 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 81 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 191 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-22 16:25:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-12-22 16:25:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-12-22 16:25:12,592 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 10 [2021-12-22 16:25:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,592 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-12-22 16:25:12,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-12-22 16:25:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:25:12,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,593 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-22 16:25:12,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:12,794 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-22 16:25:12,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:12,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834639746] [2021-12-22 16:25:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:12,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:12,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 16:25:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:25:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:12,855 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 8 treesize of output 7 [2021-12-22 16:25:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:13,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:13,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:13,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834639746] [2021-12-22 16:25:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834639746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:13,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-22 16:25:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553347389] [2021-12-22 16:25:13,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:13,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:25:13,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:25:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:25:13,463 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,118 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-12-22 16:25:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:25:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:25:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,120 INFO L225 Difference]: With dead ends: 73 [2021-12-22 16:25:14,120 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 16:25:14,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:25:14,121 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 111 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 23 Unchecked, 0.6s Time] [2021-12-22 16:25:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 16:25:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-22 16:25:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-22 16:25:14,128 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 10 [2021-12-22 16:25:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-22 16:25:14,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-22 16:25:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 16:25:14,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:14,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:14,338 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash 363894000, now seen corresponding path program 1 times [2021-12-22 16:25:14,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:14,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96921184] [2021-12-22 16:25:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:14,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:14,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 16:25:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:25:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:14,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:14,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:14,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96921184] [2021-12-22 16:25:14,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96921184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:14,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:14,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:25:14,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281325709] [2021-12-22 16:25:14,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:14,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:14,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:14,440 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,673 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-12-22 16:25:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 16:25:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,675 INFO L225 Difference]: With dead ends: 75 [2021-12-22 16:25:14,675 INFO L226 Difference]: Without dead ends: 75 [2021-12-22 16:25:14,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:25:14,676 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 138 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:25:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-22 16:25:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2021-12-22 16:25:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-12-22 16:25:14,680 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 13 [2021-12-22 16:25:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,680 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-12-22 16:25:14,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-12-22 16:25:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 16:25:14,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:14,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:14,881 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2021-12-22 16:25:14,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:14,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943006262] [2021-12-22 16:25:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:14,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:14,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:14,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 16:25:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:25:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:14,941 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 8 treesize of output 7 [2021-12-22 16:25:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:15,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:15,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943006262] [2021-12-22 16:25:15,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943006262] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 16:25:15,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:25:15,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-12-22 16:25:15,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575956783] [2021-12-22 16:25:15,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:15,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:25:15,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:25:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:25:15,561 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:16,003 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-22 16:25:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:25:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 16:25:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:16,005 INFO L225 Difference]: With dead ends: 57 [2021-12-22 16:25:16,005 INFO L226 Difference]: Without dead ends: 57 [2021-12-22 16:25:16,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:25:16,006 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:16,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 45 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:25:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-22 16:25:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-12-22 16:25:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-22 16:25:16,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 13 [2021-12-22 16:25:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:16,010 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-22 16:25:16,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-22 16:25:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:25:16,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:16,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:16,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:16,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:16,224 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-12-22 16:25:16,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:16,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312583575] [2021-12-22 16:25:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:16,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:16,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:16,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:16,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 16:25:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:16,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 16:25:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:16,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 16:25:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:16,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:16,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312583575] [2021-12-22 16:25:16,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312583575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:16,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:16,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:25:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942905669] [2021-12-22 16:25:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:25:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:25:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:25:16,472 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:16,752 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-22 16:25:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:25:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-22 16:25:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:16,754 INFO L225 Difference]: With dead ends: 63 [2021-12-22 16:25:16,754 INFO L226 Difference]: Without dead ends: 63 [2021-12-22 16:25:16,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:25:16,755 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:16,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-12-22 16:25:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-22 16:25:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-12-22 16:25:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-22 16:25:16,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 14 [2021-12-22 16:25:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:16,758 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-22 16:25:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-22 16:25:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 16:25:16,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:16,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:16,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:16,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:16,960 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash 267720213, now seen corresponding path program 1 times [2021-12-22 16:25:16,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930858884] [2021-12-22 16:25:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:16,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:16,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:16,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 16:25:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:25:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:25:17,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:17,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930858884] [2021-12-22 16:25:17,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930858884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:17,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:17,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:17,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753482513] [2021-12-22 16:25:17,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:17,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:17,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:17,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:17,107 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:17,110 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-12-22 16:25:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 16:25:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:17,111 INFO L225 Difference]: With dead ends: 61 [2021-12-22 16:25:17,111 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 16:25:17,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:17,112 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:17,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 88 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2021-12-22 16:25:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 16:25:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-12-22 16:25:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-22 16:25:17,122 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 16 [2021-12-22 16:25:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-22 16:25:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-22 16:25:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:25:17,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:17,123 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:17,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-22 16:25:17,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:17,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash -290583109, now seen corresponding path program 1 times [2021-12-22 16:25:17,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212933353] [2021-12-22 16:25:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:17,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:17,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:17,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 16:25:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:25:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:17,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:17,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212933353] [2021-12-22 16:25:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212933353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:17,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:17,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:25:17,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168928878] [2021-12-22 16:25:17,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:25:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:25:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:25:17,471 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:17,537 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-22 16:25:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:25:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 16:25:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:17,538 INFO L225 Difference]: With dead ends: 60 [2021-12-22 16:25:17,538 INFO L226 Difference]: Without dead ends: 49 [2021-12-22 16:25:17,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:25:17,539 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:17,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 179 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-22 16:25:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-22 16:25:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-22 16:25:17,542 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 17 [2021-12-22 16:25:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:17,542 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-22 16:25:17,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-22 16:25:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:25:17,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:17,543 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:17,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:17,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1570446787, now seen corresponding path program 1 times [2021-12-22 16:25:17,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:17,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329150153] [2021-12-22 16:25:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:17,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:17,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:17,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 16:25:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:25:17,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:17,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:17,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:17,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329150153] [2021-12-22 16:25:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329150153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:17,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:17,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:25:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972496411] [2021-12-22 16:25:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:25:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:25:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:25:17,892 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:18,083 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-12-22 16:25:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:25:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 16:25:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:18,094 INFO L225 Difference]: With dead ends: 74 [2021-12-22 16:25:18,094 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 16:25:18,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:25:18,094 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:18,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:25:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 16:25:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2021-12-22 16:25:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.3) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-22 16:25:18,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 17 [2021-12-22 16:25:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:18,096 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-22 16:25:18,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-22 16:25:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 16:25:18,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:18,097 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-22 16:25:18,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:18,300 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-22 16:25:18,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291175735] [2021-12-22 16:25:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:25:18,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:18,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:18,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 16:25:18,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:25:18,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:18,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:25:18,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:18,370 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 8 treesize of output 7 [2021-12-22 16:25:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:18,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:19,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291175735] [2021-12-22 16:25:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291175735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:19,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:19,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-22 16:25:19,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370817247] [2021-12-22 16:25:19,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:25:19,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:25:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:25:19,401 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:22,044 INFO L93 Difference]: Finished difference Result 197 states and 222 transitions. [2021-12-22 16:25:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:25:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 16:25:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:22,046 INFO L225 Difference]: With dead ends: 197 [2021-12-22 16:25:22,046 INFO L226 Difference]: Without dead ends: 197 [2021-12-22 16:25:22,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:25:22,046 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 460 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:22,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 319 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 94 Unchecked, 1.3s Time] [2021-12-22 16:25:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-22 16:25:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 62. [2021-12-22 16:25:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-12-22 16:25:22,048 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 18 [2021-12-22 16:25:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-12-22 16:25:22,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-12-22 16:25:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 16:25:22,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:22,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:22,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:22,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:22,250 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -511718013, now seen corresponding path program 1 times [2021-12-22 16:25:22,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165076850] [2021-12-22 16:25:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:22,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:22,253 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:22,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 16:25:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:22,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:25:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:22,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:22,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165076850] [2021-12-22 16:25:22,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165076850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:22,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:22,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:25:22,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179031282] [2021-12-22 16:25:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:22,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:25:22,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:25:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:25:22,391 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:22,487 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-22 16:25:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:25:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 16:25:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:22,489 INFO L225 Difference]: With dead ends: 77 [2021-12-22 16:25:22,489 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 16:25:22,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:25:22,489 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:22,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 53 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:25:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 16:25:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-12-22 16:25:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.28125) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-12-22 16:25:22,492 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 18 [2021-12-22 16:25:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:22,492 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-12-22 16:25:22,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-12-22 16:25:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 16:25:22,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:22,492 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:22,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-22 16:25:22,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:22,699 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-12-22 16:25:22,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:22,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176089056] [2021-12-22 16:25:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:22,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:22,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:22,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 16:25:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:22,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:25:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:22,763 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 8 treesize of output 7 [2021-12-22 16:25:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:23,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:24,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176089056] [2021-12-22 16:25:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176089056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:24,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:24,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-12-22 16:25:24,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813345491] [2021-12-22 16:25:24,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:24,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:25:24,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:25:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:25:24,280 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:24,629 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-12-22 16:25:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:25:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 16:25:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:24,630 INFO L225 Difference]: With dead ends: 82 [2021-12-22 16:25:24,630 INFO L226 Difference]: Without dead ends: 82 [2021-12-22 16:25:24,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:25:24,631 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:24,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2021-12-22 16:25:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-22 16:25:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-12-22 16:25:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2021-12-22 16:25:24,633 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2021-12-22 16:25:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:24,633 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2021-12-22 16:25:24,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2021-12-22 16:25:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 16:25:24,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:24,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:24,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:24,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:24,840 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1331880655, now seen corresponding path program 1 times [2021-12-22 16:25:24,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246596370] [2021-12-22 16:25:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:24,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:24,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 16:25:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:24,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 16:25:24,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:24,903 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 8 treesize of output 7 [2021-12-22 16:25:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:25,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:26,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246596370] [2021-12-22 16:25:26,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246596370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:26,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:26,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-12-22 16:25:26,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191892216] [2021-12-22 16:25:26,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:26,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:25:26,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:25:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:25:26,311 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:26,980 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-12-22 16:25:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:25:26,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 16:25:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:26,982 INFO L225 Difference]: With dead ends: 79 [2021-12-22 16:25:26,982 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 16:25:26,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:25:26,982 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:26,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 109 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 5 Unchecked, 0.5s Time] [2021-12-22 16:25:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 16:25:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-12-22 16:25:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-22 16:25:26,984 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 19 [2021-12-22 16:25:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:26,984 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-22 16:25:26,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-22 16:25:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:25:26,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:26,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:26,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-22 16:25:27,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:27,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 2 times [2021-12-22 16:25:27,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:27,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514943738] [2021-12-22 16:25:27,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:25:27,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:27,187 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:27,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 16:25:27,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:25:27,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 16:25:27,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:27,258 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 8 treesize of output 7 [2021-12-22 16:25:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:27,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:29,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:29,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514943738] [2021-12-22 16:25:29,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514943738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:29,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:29,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-22 16:25:29,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361333044] [2021-12-22 16:25:29,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:29,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:25:29,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:29,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:25:29,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:25:29,300 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:33,676 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2021-12-22 16:25:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 16:25:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 16:25:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:33,679 INFO L225 Difference]: With dead ends: 153 [2021-12-22 16:25:33,679 INFO L226 Difference]: Without dead ends: 153 [2021-12-22 16:25:33,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 16:25:33,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 335 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:33,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 121 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 217 Invalid, 0 Unknown, 9 Unchecked, 1.4s Time] [2021-12-22 16:25:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-22 16:25:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 96. [2021-12-22 16:25:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 95 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-22 16:25:33,683 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 23 [2021-12-22 16:25:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:33,683 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-22 16:25:33,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-22 16:25:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:25:33,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:33,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:33,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:33,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:33,906 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:33,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2028106434, now seen corresponding path program 1 times [2021-12-22 16:25:33,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:33,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743910184] [2021-12-22 16:25:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:33,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:33,908 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-22 16:25:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:25:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:34,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:34,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:34,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743910184] [2021-12-22 16:25:34,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743910184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:34,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:34,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-22 16:25:34,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055887561] [2021-12-22 16:25:34,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:34,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:25:34,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:25:34,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:25:34,297 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:34,727 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2021-12-22 16:25:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:25:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 16:25:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:34,728 INFO L225 Difference]: With dead ends: 128 [2021-12-22 16:25:34,732 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 16:25:34,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:25:34,733 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:34,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 104 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:25:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 16:25:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2021-12-22 16:25:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-12-22 16:25:34,736 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 25 [2021-12-22 16:25:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:34,736 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-12-22 16:25:34,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-12-22 16:25:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:25:34,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:34,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:34,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-22 16:25:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:34,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1990878972, now seen corresponding path program 2 times [2021-12-22 16:25:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305606180] [2021-12-22 16:25:34,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:25:34,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:34,945 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:34,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-22 16:25:34,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:25:34,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:25:34,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 16:25:35,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:25:35,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:35,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305606180] [2021-12-22 16:25:35,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305606180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:35,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:35,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:35,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377302750] [2021-12-22 16:25:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:35,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:35,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:35,122 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:35,158 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2021-12-22 16:25:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 16:25:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:35,159 INFO L225 Difference]: With dead ends: 139 [2021-12-22 16:25:35,159 INFO L226 Difference]: Without dead ends: 137 [2021-12-22 16:25:35,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:35,160 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:35,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-22 16:25:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-22 16:25:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-12-22 16:25:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.2777777777777777) internal successors, (161), 129 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2021-12-22 16:25:35,163 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 28 [2021-12-22 16:25:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:35,164 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2021-12-22 16:25:35,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2021-12-22 16:25:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 16:25:35,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:35,166 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:35,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:35,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:35,375 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1587681108, now seen corresponding path program 1 times [2021-12-22 16:25:35,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:35,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803960868] [2021-12-22 16:25:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:35,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:35,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:35,380 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-22 16:25:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:25:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:35,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:35,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:35,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803960868] [2021-12-22 16:25:35,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803960868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:35,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:35,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-12-22 16:25:35,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106277075] [2021-12-22 16:25:35,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:35,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:25:35,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:25:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:25:35,870 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:36,611 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2021-12-22 16:25:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:25:36,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-22 16:25:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:36,613 INFO L225 Difference]: With dead ends: 169 [2021-12-22 16:25:36,613 INFO L226 Difference]: Without dead ends: 159 [2021-12-22 16:25:36,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-12-22 16:25:36,614 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:36,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 124 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:25:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-22 16:25:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 129. [2021-12-22 16:25:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.256) internal successors, (157), 128 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 157 transitions. [2021-12-22 16:25:36,619 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 157 transitions. Word has length 29 [2021-12-22 16:25:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:36,619 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 157 transitions. [2021-12-22 16:25:36,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 157 transitions. [2021-12-22 16:25:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:25:36,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:36,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:36,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-22 16:25:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:36,827 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1795053594, now seen corresponding path program 2 times [2021-12-22 16:25:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036797359] [2021-12-22 16:25:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:25:36,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:36,829 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:36,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-22 16:25:36,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:25:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:25:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:36,909 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 8 treesize of output 7 [2021-12-22 16:25:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 16:25:37,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 16:25:37,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036797359] [2021-12-22 16:25:37,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036797359] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:37,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:37,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-22 16:25:37,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214431792] [2021-12-22 16:25:37,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:37,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:25:37,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:25:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:25:37,772 INFO L87 Difference]: Start difference. First operand 129 states and 157 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:37,989 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2021-12-22 16:25:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:25:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-22 16:25:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:37,992 INFO L225 Difference]: With dead ends: 164 [2021-12-22 16:25:37,992 INFO L226 Difference]: Without dead ends: 164 [2021-12-22 16:25:37,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:25:37,998 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:37,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 186 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-12-22 16:25:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-22 16:25:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 129. [2021-12-22 16:25:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.248) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2021-12-22 16:25:38,001 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 31 [2021-12-22 16:25:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:38,002 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2021-12-22 16:25:38,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2021-12-22 16:25:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 16:25:38,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:38,003 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:38,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:38,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:38,207 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash 740071271, now seen corresponding path program 2 times [2021-12-22 16:25:38,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:38,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095932199] [2021-12-22 16:25:38,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:25:38,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:38,209 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:38,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-22 16:25:38,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:25:38,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:25:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:38,290 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 8 treesize of output 7 [2021-12-22 16:25:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:39,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:40,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095932199] [2021-12-22 16:25:40,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095932199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:40,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:40,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-22 16:25:40,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899693314] [2021-12-22 16:25:40,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:40,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:25:40,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:25:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:25:40,294 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:42,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:42,545 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2021-12-22 16:25:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 16:25:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-22 16:25:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:42,547 INFO L225 Difference]: With dead ends: 155 [2021-12-22 16:25:42,547 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 16:25:42,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-12-22 16:25:42,547 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:42,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 170 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2021-12-22 16:25:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 16:25:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2021-12-22 16:25:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 147 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 186 transitions. [2021-12-22 16:25:42,550 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 186 transitions. Word has length 32 [2021-12-22 16:25:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:42,550 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 186 transitions. [2021-12-22 16:25:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 186 transitions. [2021-12-22 16:25:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 16:25:42,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:42,550 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:42,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-22 16:25:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:42,751 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1154994598, now seen corresponding path program 1 times [2021-12-22 16:25:42,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944503001] [2021-12-22 16:25:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:42,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:42,753 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-22 16:25:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:25:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:42,824 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 8 treesize of output 7 [2021-12-22 16:25:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:25:45,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:45,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944503001] [2021-12-22 16:25:45,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944503001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:45,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:45,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-22 16:25:45,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295923592] [2021-12-22 16:25:45,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:45,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:25:45,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:25:45,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:25:45,945 INFO L87 Difference]: Start difference. First operand 148 states and 186 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:48,034 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2021-12-22 16:25:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 16:25:48,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 16:25:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:48,039 INFO L225 Difference]: With dead ends: 169 [2021-12-22 16:25:48,040 INFO L226 Difference]: Without dead ends: 169 [2021-12-22 16:25:48,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:25:48,041 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:48,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 156 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2021-12-22 16:25:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-22 16:25:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2021-12-22 16:25:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.286624203821656) internal successors, (202), 160 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2021-12-22 16:25:48,047 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 33 [2021-12-22 16:25:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:48,047 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2021-12-22 16:25:48,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2021-12-22 16:25:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 16:25:48,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:48,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:48,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-22 16:25:48,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:48,254 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1467372908, now seen corresponding path program 3 times [2021-12-22 16:25:48,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:48,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021934479] [2021-12-22 16:25:48,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:25:48,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:48,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:48,256 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:48,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-22 16:25:48,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 16:25:48,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 16:25:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:48,427 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 8 treesize of output 7 [2021-12-22 16:25:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:25:48,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:50,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021934479] [2021-12-22 16:25:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021934479] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:50,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-12-22 16:25:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396421149] [2021-12-22 16:25:50,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 16:25:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 16:25:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:25:50,614 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:51,593 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2021-12-22 16:25:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 16:25:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 16:25:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:51,594 INFO L225 Difference]: With dead ends: 199 [2021-12-22 16:25:51,594 INFO L226 Difference]: Without dead ends: 197 [2021-12-22 16:25:51,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:25:51,595 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:51,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 244 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 164 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2021-12-22 16:25:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-22 16:25:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2021-12-22 16:25:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 189 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2021-12-22 16:25:51,598 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 33 [2021-12-22 16:25:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:51,598 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2021-12-22 16:25:51,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2021-12-22 16:25:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 16:25:51,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:51,599 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-22 16:25:51,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-22 16:25:51,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:25:51,807 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:25:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-22 16:25:51,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:25:51,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762367903] [2021-12-22 16:25:51,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:25:51,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:25:51,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:25:51,808 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:25:51,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-22 16:25:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-22 16:25:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:25:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 16:25:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:51,933 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 8 treesize of output 7 [2021-12-22 16:25:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:52,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:55,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:25:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762367903] [2021-12-22 16:25:55,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762367903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:55,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:25:55,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-22 16:25:55,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348785118] [2021-12-22 16:25:55,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:55,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 16:25:55,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:25:55,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 16:25:55,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:25:55,646 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:26:15,744 INFO L93 Difference]: Finished difference Result 1668 states and 2115 transitions. [2021-12-22 16:26:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-22 16:26:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 16:26:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:26:15,750 INFO L225 Difference]: With dead ends: 1668 [2021-12-22 16:26:15,750 INFO L226 Difference]: Without dead ends: 1668 [2021-12-22 16:26:15,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=657, Invalid=1505, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 16:26:15,751 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1642 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:26:15,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1642 Valid, 935 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 895 Invalid, 0 Unknown, 97 Unchecked, 5.0s Time] [2021-12-22 16:26:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-12-22 16:26:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 222. [2021-12-22 16:26:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.2706422018348624) internal successors, (277), 221 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 277 transitions. [2021-12-22 16:26:15,760 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 277 transitions. Word has length 34 [2021-12-22 16:26:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:26:15,760 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 277 transitions. [2021-12-22 16:26:15,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 277 transitions. [2021-12-22 16:26:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 16:26:15,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:26:15,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:26:15,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-22 16:26:15,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:26:15,968 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:26:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:26:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1553594099, now seen corresponding path program 1 times [2021-12-22 16:26:15,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:26:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043152354] [2021-12-22 16:26:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:26:15,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:26:15,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:26:15,971 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:26:15,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-22 16:26:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:26:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:26:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:26:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 16:26:16,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:26:16,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:26:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043152354] [2021-12-22 16:26:16,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043152354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:26:16,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:26:16,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:26:16,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807960593] [2021-12-22 16:26:16,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:26:16,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:26:16,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:26:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:26:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:26:16,240 INFO L87 Difference]: Start difference. First operand 222 states and 277 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:26:16,252 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2021-12-22 16:26:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:26:16,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 16:26:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:26:16,253 INFO L225 Difference]: With dead ends: 221 [2021-12-22 16:26:16,253 INFO L226 Difference]: Without dead ends: 212 [2021-12-22 16:26:16,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:26:16,254 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:26:16,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-12-22 16:26:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-22 16:26:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-22 16:26:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.2583732057416268) internal successors, (263), 211 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2021-12-22 16:26:16,259 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 34 [2021-12-22 16:26:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:26:16,259 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2021-12-22 16:26:16,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2021-12-22 16:26:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 16:26:16,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:26:16,260 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:26:16,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-22 16:26:16,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:26:16,467 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:26:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:26:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1786478211, now seen corresponding path program 1 times [2021-12-22 16:26:16,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:26:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341581788] [2021-12-22 16:26:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:26:16,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:26:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:26:16,476 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:26:16,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-22 16:26:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:26:16,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:26:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:26:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 16:26:16,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:26:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:26:17,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:26:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341581788] [2021-12-22 16:26:17,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341581788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:26:17,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:26:17,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-22 16:26:17,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612727399] [2021-12-22 16:26:17,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:26:17,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 16:26:17,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:26:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 16:26:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:26:17,163 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:26:17,886 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2021-12-22 16:26:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:26:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-22 16:26:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:26:17,889 INFO L225 Difference]: With dead ends: 217 [2021-12-22 16:26:17,889 INFO L226 Difference]: Without dead ends: 201 [2021-12-22 16:26:17,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:26:17,890 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 125 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:26:17,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 107 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:26:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-22 16:26:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-22 16:26:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.2575757575757576) internal successors, (249), 200 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 249 transitions. [2021-12-22 16:26:17,894 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 249 transitions. Word has length 35 [2021-12-22 16:26:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:26:17,894 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 249 transitions. [2021-12-22 16:26:17,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:26:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 249 transitions. [2021-12-22 16:26:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 16:26:17,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:26:17,895 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:26:17,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-22 16:26:18,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:26:18,105 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-22 16:26:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:26:18,106 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 2 times [2021-12-22 16:26:18,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:26:18,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166673249] [2021-12-22 16:26:18,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:26:18,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:26:18,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:26:18,107 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:26:18,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-22 16:26:18,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:26:18,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:26:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 16:26:18,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:26:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 16:26:18,551 INFO L328 TraceCheckSpWp]: Computing backward predicates...