./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0019_1-2.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/list-ext-properties/test-0019_1-2.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 ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:34:09,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:34:09,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:34:09,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:34:09,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:34:09,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:34:09,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:34:09,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:34:09,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:34:09,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:34:09,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:34:09,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:34:09,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:34:09,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:34:09,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:34:09,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:34:09,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:34:09,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:34:09,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:34:09,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:34:09,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:34:09,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:34:09,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:34:09,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:34:09,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:34:09,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:34:09,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:34:09,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:34:09,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:34:09,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:34:09,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:34:09,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:34:09,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:34:09,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:34:09,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:34:09,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:34:09,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:34:09,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:34:09,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:34:09,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:34:09,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:34:09,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:34:09,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:34:09,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:34:09,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:34:09,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:34:09,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:34:09,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:34:09,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:34:09,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:34:09,987 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:34:09,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:34:09,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:34:09,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:34:09,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:34:09,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:34:09,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:34:09,988 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:34:09,989 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:34:09,989 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:34:09,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:34:09,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:34:09,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:34:09,990 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:34:09,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:34:09,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:34:09,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:34:09,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:09,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:34:09,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:34:09,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:34:09,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:34:09,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:34:09,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 [2021-12-22 16:34:10,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:34:10,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:34:10,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:34:10,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:34:10,269 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:34:10,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-22 16:34:10,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa7bf9ef/ad0933b76c3a45b4a3d5da83932d69dd/FLAGe91368f97 [2021-12-22 16:34:10,774 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:34:10,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-22 16:34:10,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa7bf9ef/ad0933b76c3a45b4a3d5da83932d69dd/FLAGe91368f97 [2021-12-22 16:34:11,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa7bf9ef/ad0933b76c3a45b4a3d5da83932d69dd [2021-12-22 16:34:11,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:34:11,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:34:11,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:11,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:34:11,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:34:11,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:11" (1/1) ... [2021-12-22 16:34:11,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a2ec4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:11, skipping insertion in model container [2021-12-22 16:34:11,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:11" (1/1) ... [2021-12-22 16:34:11,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:34:11,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:34:11,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:11,504 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 16:34:11,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11553dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:11, skipping insertion in model container [2021-12-22 16:34:11,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:11,506 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 16:34:11,508 INFO L158 Benchmark]: Toolchain (without parser) took 357.43ms. Allocated memory is still 98.6MB. Free memory was 66.9MB in the beginning and 73.9MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:34:11,509 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 81.8MB. Free memory is still 38.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:34:11,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.00ms. Allocated memory is still 98.6MB. Free memory was 66.9MB in the beginning and 73.9MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:34:11,512 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 81.8MB. Free memory is still 38.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.00ms. Allocated memory is still 98.6MB. Free memory was 66.9MB in the beginning and 73.9MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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/list-ext-properties/test-0019_1-2.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 ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:34:13,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:34:13,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:34:13,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:34:13,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:34:13,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:34:13,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:34:13,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:34:13,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:34:13,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:34:13,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:34:13,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:34:13,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:34:13,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:34:13,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:34:13,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:34:13,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:34:13,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:34:13,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:34:13,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:34:13,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:34:13,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:34:13,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:34:13,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:34:13,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:34:13,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:34:13,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:34:13,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:34:13,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:34:13,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:34:13,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:34:13,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:34:13,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:34:13,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:34:13,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:34:13,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:34:13,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:34:13,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:34:13,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:34:13,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:34:13,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:34:13,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 16:34:13,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:34:13,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:34:13,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:34:13,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:34:13,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:34:13,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:34:13,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:34:13,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:34:13,353 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:34:13,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:34:13,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:34:13,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:34:13,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:34:13,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:34:13,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:34:13,355 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:34:13,356 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:34:13,356 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:34:13,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:34:13,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:34:13,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 16:34:13,357 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 16:34:13,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:34:13,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:34:13,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:34:13,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:34:13,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:34:13,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:13,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:34:13,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:34:13,359 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 16:34:13,359 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 16:34:13,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:34:13,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 16:34:13,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 [2021-12-22 16:34:13,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:34:13,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:34:13,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:34:13,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:34:13,755 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:34:13,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-22 16:34:13,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b083196/09c65a6dfc104e22ac17dd3394e5584d/FLAG482a29294 [2021-12-22 16:34:14,311 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:34:14,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-22 16:34:14,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b083196/09c65a6dfc104e22ac17dd3394e5584d/FLAG482a29294 [2021-12-22 16:34:14,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b083196/09c65a6dfc104e22ac17dd3394e5584d [2021-12-22 16:34:14,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:34:14,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:34:14,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:14,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:34:14,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:34:14,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:14" (1/1) ... [2021-12-22 16:34:14,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43488039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:14, skipping insertion in model container [2021-12-22 16:34:14,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:14" (1/1) ... [2021-12-22 16:34:14,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:34:14,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:34:14,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:14,957 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 16:34:14,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:34:14,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:14,993 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:34:15,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:15,056 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:34:15,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15 WrapperNode [2021-12-22 16:34:15,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:15,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:34:15,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:34:15,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:34:15,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,107 INFO L137 Inliner]: procedures = 128, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2021-12-22 16:34:15,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:34:15,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:34:15,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:34:15,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:34:15,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:34:15,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:34:15,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:34:15,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:34:15,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (1/1) ... [2021-12-22 16:34:15,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:15,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:15,200 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 16:34:15,223 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 16:34:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 16:34:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:34:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:34:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:34:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:34:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:34:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:34:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 16:34:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 16:34:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:34:15,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:34:15,356 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:34:15,358 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:34:15,701 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:34:15,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:34:15,707 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 16:34:15,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:15 BoogieIcfgContainer [2021-12-22 16:34:15,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:34:15,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:34:15,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:34:15,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:34:15,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:34:14" (1/3) ... [2021-12-22 16:34:15,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1562d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:34:15, skipping insertion in model container [2021-12-22 16:34:15,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:15" (2/3) ... [2021-12-22 16:34:15,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1562d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:34:15, skipping insertion in model container [2021-12-22 16:34:15,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:15" (3/3) ... [2021-12-22 16:34:15,716 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019_1-2.i [2021-12-22 16:34:15,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:34:15,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-12-22 16:34:15,757 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:34:15,764 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 16:34:15,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-12-22 16:34:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 69 states have internal predecessors, (70), 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 16:34:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 16:34:15,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:15,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 16:34:15,797 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-22 16:34:15,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:15,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473531230] [2021-12-22 16:34:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:15,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:15,857 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 16:34:15,858 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 16:34:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:34:15,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:16,035 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 16:34:16,037 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-22 16:34:16,060 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 16:34:16,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:16,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473531230] [2021-12-22 16:34:16,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473531230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:16,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:16,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:34:16,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711969696] [2021-12-22 16:34:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:16,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:16,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:16,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:16,096 INFO L87 Difference]: Start difference. First operand has 70 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 69 states have internal predecessors, (70), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 16:34:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:16,239 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-12-22 16:34:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-22 16:34:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:16,250 INFO L225 Difference]: With dead ends: 66 [2021-12-22 16:34:16,250 INFO L226 Difference]: Without dead ends: 64 [2021-12-22 16:34:16,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:34:16,255 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:16,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 38 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-22 16:34:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-22 16:34:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 63 states have internal predecessors, (64), 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 16:34:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-12-22 16:34:16,294 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 3 [2021-12-22 16:34:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:16,294 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-12-22 16:34:16,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 16:34:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-12-22 16:34:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 16:34:16,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:16,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 16:34:16,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 16:34:16,504 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 16:34:16,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-22 16:34:16,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:16,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212314032] [2021-12-22 16:34:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:16,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:16,508 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 16:34:16,509 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 16:34:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:34:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:16,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-22 16:34:16,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:34:16,627 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 16:34:16,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:16,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:16,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212314032] [2021-12-22 16:34:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212314032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:16,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:16,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:34:16,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649310785] [2021-12-22 16:34:16,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:16,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:16,631 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 16:34:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:16,738 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-12-22 16:34:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-22 16:34:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:16,740 INFO L225 Difference]: With dead ends: 63 [2021-12-22 16:34:16,740 INFO L226 Difference]: Without dead ends: 63 [2021-12-22 16:34:16,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:34:16,741 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:16,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-22 16:34:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-22 16:34:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 62 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 16:34:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-12-22 16:34:16,748 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 3 [2021-12-22 16:34:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:16,748 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-12-22 16:34:16,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 16:34:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-12-22 16:34:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 16:34:16,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:16,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 16:34:16,760 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 16:34:16,960 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 16:34:16,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-12-22 16:34:16,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:16,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212383056] [2021-12-22 16:34:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:16,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:16,968 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 16:34:16,983 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 16:34:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:34:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:17,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-22 16:34:17,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:34:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:17,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:34:17,125 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:34:17,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:34:17,129 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 16:34:17,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:17,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212383056] [2021-12-22 16:34:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212383056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:17,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:17,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:17,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105968437] [2021-12-22 16:34:17,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:17,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:17,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:17,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:17,133 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 16:34:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:17,297 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-12-22 16:34:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-12-22 16:34:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:17,299 INFO L225 Difference]: With dead ends: 60 [2021-12-22 16:34:17,299 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 16:34:17,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:17,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:17,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:34:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 16:34:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 16:34:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 59 states have internal predecessors, (60), 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 16:34:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-12-22 16:34:17,311 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 5 [2021-12-22 16:34:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:17,312 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-12-22 16:34:17,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 16:34:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-12-22 16:34:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:34:17,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:17,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:17,327 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 16:34:17,525 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 16:34:17,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash 59199982, now seen corresponding path program 1 times [2021-12-22 16:34:17,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:17,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578902173] [2021-12-22 16:34:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:17,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:17,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:17,528 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 16:34:17,530 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 16:34:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 16:34:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:17,654 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:34:17,655 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:34:17,673 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-22 16:34:17,674 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-22 16:34:17,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:17,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:17,799 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 16:34:17,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 16:34:17,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:34:17,865 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-22 16:34:17,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 16:34:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:17,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:34:17,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-22 16:34:17,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:34:17,932 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 16:34:17,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:17,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:17,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578902173] [2021-12-22 16:34:17,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578902173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:17,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:17,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:34:17,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949436115] [2021-12-22 16:34:17,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:17,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:34:17,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:34:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:34:17,937 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 16:34:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:18,280 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-12-22 16:34:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:34:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 8 [2021-12-22 16:34:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:18,281 INFO L225 Difference]: With dead ends: 59 [2021-12-22 16:34:18,282 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 16:34:18,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:18,283 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 142 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:34:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 16:34:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-22 16:34:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 58 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 16:34:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-22 16:34:18,288 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 8 [2021-12-22 16:34:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:18,288 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-22 16:34:18,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 16:34:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-22 16:34:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:34:18,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:18,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:18,301 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 16:34:18,499 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 16:34:18,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash 59199981, now seen corresponding path program 1 times [2021-12-22 16:34:18,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99253847] [2021-12-22 16:34:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:18,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:18,502 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 16:34:18,504 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 16:34:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:18,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:34:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:18,594 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-22 16:34:18,595 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-22 16:34:18,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:18,650 INFO L353 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-22 16:34:18,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 34 [2021-12-22 16:34:18,692 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-22 16:34:18,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-12-22 16:34:18,741 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 16:34:18,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2021-12-22 16:34:18,753 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 16:34:18,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:18,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:18,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99253847] [2021-12-22 16:34:18,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99253847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:18,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:18,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:34:18,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633744599] [2021-12-22 16:34:18,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:18,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:34:18,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:18,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:34:18,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:34:18,756 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 16:34:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:19,051 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-12-22 16:34:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:34:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 8 [2021-12-22 16:34:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:19,052 INFO L225 Difference]: With dead ends: 58 [2021-12-22 16:34:19,052 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 16:34:19,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:34:19,055 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:19,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 169 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:34:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 16:34:19,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-22 16:34:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 57 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 16:34:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-12-22 16:34:19,060 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 8 [2021-12-22 16:34:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:19,061 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-12-22 16:34:19,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 16:34:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-12-22 16:34:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:34:19,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:19,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:19,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-22 16:34:19,270 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 16:34:19,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937559, now seen corresponding path program 1 times [2021-12-22 16:34:19,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167846539] [2021-12-22 16:34:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:19,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:19,273 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 16:34:19,274 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 16:34:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 16:34:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:19,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:34:19,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:19,420 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 16:34:19,450 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-22 16:34:19,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-22 16:34:19,530 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:19,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-22 16:34:19,555 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 16:34:19,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-12-22 16:34:19,568 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 16:34:19,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:19,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167846539] [2021-12-22 16:34:19,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167846539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:19,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:19,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:34:19,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000329868] [2021-12-22 16:34:19,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:19,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:34:19,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:34:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:19,570 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 16:34:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:19,815 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-12-22 16:34:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:34:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 11 [2021-12-22 16:34:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:19,816 INFO L225 Difference]: With dead ends: 57 [2021-12-22 16:34:19,816 INFO L226 Difference]: Without dead ends: 57 [2021-12-22 16:34:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:34:19,817 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:19,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 183 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:34:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-22 16:34:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-22 16:34:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 56 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 16:34:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-12-22 16:34:19,821 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 11 [2021-12-22 16:34:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:19,822 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-12-22 16:34:19,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 16:34:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-12-22 16:34:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:34:19,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:19,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:19,832 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 16:34:20,031 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 16:34:20,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937558, now seen corresponding path program 1 times [2021-12-22 16:34:20,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314339555] [2021-12-22 16:34:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:20,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:20,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:20,034 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 16:34:20,036 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 16:34:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:20,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:34:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:20,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:34:20,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:20,197 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 16:34:20,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:20,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-22 16:34:20,371 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:20,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-22 16:34:20,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 16:34:20,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-22 16:34:20,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:34:20,434 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 16:34:20,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:20,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:20,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314339555] [2021-12-22 16:34:20,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314339555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:20,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:20,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:34:20,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343785007] [2021-12-22 16:34:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:20,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:34:20,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:34:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:20,437 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 16:34:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:20,670 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-12-22 16:34:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:34:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 11 [2021-12-22 16:34:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:20,672 INFO L225 Difference]: With dead ends: 56 [2021-12-22 16:34:20,672 INFO L226 Difference]: Without dead ends: 56 [2021-12-22 16:34:20,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:34:20,674 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:20,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 225 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:34:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-22 16:34:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-22 16:34:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.696969696969697) internal successors, (56), 55 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 16:34:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-12-22 16:34:20,678 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 11 [2021-12-22 16:34:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-12-22 16:34:20,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 16:34:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-12-22 16:34:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:34:20,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:20,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:20,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:20,883 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 16:34:20,884 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886990, now seen corresponding path program 1 times [2021-12-22 16:34:20,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:20,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542882246] [2021-12-22 16:34:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:20,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:20,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:20,886 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 16:34:20,887 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 16:34:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:34:21,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:21,053 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 16:34:21,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:21,054 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:21,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542882246] [2021-12-22 16:34:21,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542882246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:21,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:21,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:21,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339054605] [2021-12-22 16:34:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:21,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:21,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:21,056 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 16:34:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:21,149 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-12-22 16:34:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 16:34:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:21,150 INFO L225 Difference]: With dead ends: 54 [2021-12-22 16:34:21,150 INFO L226 Difference]: Without dead ends: 54 [2021-12-22 16:34:21,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 16:34:21,151 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:21,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-22 16:34:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-22 16:34:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 53 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 16:34:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-12-22 16:34:21,154 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 14 [2021-12-22 16:34:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:21,154 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-12-22 16:34:21,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 16:34:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-12-22 16:34:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:34:21,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:21,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:21,167 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 16:34:21,355 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 16:34:21,356 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886989, now seen corresponding path program 1 times [2021-12-22 16:34:21,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452400236] [2021-12-22 16:34:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:21,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:21,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:21,358 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 16:34:21,360 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 16:34:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:34:21,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:21,554 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 16:34:21,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:21,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452400236] [2021-12-22 16:34:21,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452400236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:21,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:21,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:21,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252228701] [2021-12-22 16:34:21,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:21,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:21,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:21,556 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 16:34:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:21,638 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-12-22 16:34:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:21,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 16:34:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:21,639 INFO L225 Difference]: With dead ends: 52 [2021-12-22 16:34:21,639 INFO L226 Difference]: Without dead ends: 52 [2021-12-22 16:34:21,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 16:34:21,640 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:21,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-22 16:34:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-22 16:34:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 51 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 16:34:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-12-22 16:34:21,644 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 14 [2021-12-22 16:34:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:21,644 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-12-22 16:34:21,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 16:34:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-12-22 16:34:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:34:21,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:21,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:21,653 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 16:34:21,847 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 16:34:21,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 478865263, now seen corresponding path program 1 times [2021-12-22 16:34:21,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:21,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808282755] [2021-12-22 16:34:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:21,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:21,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:21,849 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 16:34:21,851 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 16:34:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:34:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:21,978 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 16:34:21,983 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 16:34:21,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:21,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808282755] [2021-12-22 16:34:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808282755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:21,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:21,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:34:21,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573566560] [2021-12-22 16:34:21,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:21,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:21,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:21,985 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 16:34:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:22,060 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-12-22 16:34:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 16:34:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:22,061 INFO L225 Difference]: With dead ends: 48 [2021-12-22 16:34:22,061 INFO L226 Difference]: Without dead ends: 48 [2021-12-22 16:34:22,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 16:34:22,062 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:22,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-22 16:34:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-22 16:34:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 47 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 16:34:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-12-22 16:34:22,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 17 [2021-12-22 16:34:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:22,065 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-12-22 16:34:22,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 16:34:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-12-22 16:34:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:34:22,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:22,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:22,082 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 16:34:22,266 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 16:34:22,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 478865264, now seen corresponding path program 1 times [2021-12-22 16:34:22,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691021872] [2021-12-22 16:34:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:22,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:22,268 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 16:34:22,269 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 16:34:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:34:22,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:22,397 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 16:34:22,405 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 16:34:22,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:22,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691021872] [2021-12-22 16:34:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691021872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:22,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:22,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:34:22,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088979786] [2021-12-22 16:34:22,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:22,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:22,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:22,407 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 16:34:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:22,463 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-12-22 16:34:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 16:34:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:22,464 INFO L225 Difference]: With dead ends: 44 [2021-12-22 16:34:22,464 INFO L226 Difference]: Without dead ends: 44 [2021-12-22 16:34:22,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 16:34:22,465 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:22,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-22 16:34:22,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-22 16:34:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 43 states have internal predecessors, (44), 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 16:34:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-12-22 16:34:22,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 17 [2021-12-22 16:34:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:22,474 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-12-22 16:34:22,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 16:34:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-12-22 16:34:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:34:22,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:22,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:22,487 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 16:34:22,685 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 16:34:22,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash -925217004, now seen corresponding path program 1 times [2021-12-22 16:34:22,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179068448] [2021-12-22 16:34:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:22,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:22,687 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 16:34:22,688 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 16:34:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 16:34:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:22,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:34:22,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:22,958 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 16:34:22,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 16:34:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:23,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-22 16:34:23,129 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:23,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-22 16:34:23,256 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:23,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-22 16:34:23,473 INFO L353 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-22 16:34:23,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 48 [2021-12-22 16:34:23,564 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 16:34:23,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-12-22 16:34:23,680 INFO L353 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-12-22 16:34:23,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 56 [2021-12-22 16:34:23,796 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 16:34:23,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 27 [2021-12-22 16:34:23,921 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 16:34:23,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:23,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:23,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179068448] [2021-12-22 16:34:23,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179068448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:23,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:23,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 16:34:23,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928901870] [2021-12-22 16:34:23,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:23,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:34:23,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:34:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:34:23,924 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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 16:34:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:24,562 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-12-22 16:34:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 16:34:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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 16:34:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:24,563 INFO L225 Difference]: With dead ends: 43 [2021-12-22 16:34:24,563 INFO L226 Difference]: Without dead ends: 43 [2021-12-22 16:34:24,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:34:24,564 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:24,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 166 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-12-22 16:34:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-22 16:34:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-22 16:34:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.303030303030303) internal successors, (43), 42 states have internal predecessors, (43), 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 16:34:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-12-22 16:34:24,567 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 23 [2021-12-22 16:34:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:24,567 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-12-22 16:34:24,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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 16:34:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-12-22 16:34:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:34:24,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:24,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:24,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:24,779 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 16:34:24,779 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -925217003, now seen corresponding path program 1 times [2021-12-22 16:34:24,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763216534] [2021-12-22 16:34:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:24,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:24,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:24,782 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 16:34:24,784 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 16:34:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:25,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-22 16:34:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:25,062 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:34:25,063 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:34:25,081 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 16:34:25,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 16:34:25,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:25,169 INFO L353 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-22 16:34:25,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 16:34:25,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:34:25,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:25,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-12-22 16:34:25,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:34:25,436 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:25,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 75 [2021-12-22 16:34:25,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-22 16:34:25,744 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:25,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 79 [2021-12-22 16:34:25,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-22 16:34:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:26,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-22 16:34:26,136 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 16:34:26,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 16:34:26,336 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-22 16:34:26,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2021-12-22 16:34:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:26,396 INFO L353 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-12-22 16:34:26,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 66 [2021-12-22 16:34:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:27,826 INFO L353 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2021-12-22 16:34:27,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 97 [2021-12-22 16:34:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:28,608 INFO L353 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2021-12-22 16:34:28,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 53 [2021-12-22 16:34:45,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-12-22 16:34:45,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-22 16:34:45,786 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 16:34:45,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:45,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763216534] [2021-12-22 16:34:45,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763216534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:45,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 16:34:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121895876] [2021-12-22 16:34:45,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:45,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:34:45,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:34:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:34:45,788 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 16:34:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:48,560 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-12-22 16:34:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:34:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 16:34:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:48,561 INFO L225 Difference]: With dead ends: 41 [2021-12-22 16:34:48,561 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 16:34:48,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:34:48,562 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:48,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 127 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 182 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2021-12-22 16:34:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 16:34:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-22 16:34:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 40 states have internal predecessors, (41), 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 16:34:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-12-22 16:34:48,565 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 23 [2021-12-22 16:34:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:48,565 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-12-22 16:34:48,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 16:34:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-12-22 16:34:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 16:34:48,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:48,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:48,574 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 16:34:48,766 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 16:34:48,766 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:34:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1383043969, now seen corresponding path program 1 times [2021-12-22 16:34:48,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:34:48,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361263342] [2021-12-22 16:34:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:48,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:34:48,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:34:48,768 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 16:34:48,769 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 16:34:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 16:34:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:48,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:34:49,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:49,084 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 16:34:49,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 16:34:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:49,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-22 16:34:49,279 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:49,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-22 16:34:49,379 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:49,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-12-22 16:34:53,449 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 16:34:53,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2021-12-22 16:34:53,508 INFO L353 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-22 16:34:53,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 42 [2021-12-22 16:34:53,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:53,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-12-22 16:34:53,801 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 16:34:53,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:53,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:34:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361263342] [2021-12-22 16:34:53,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361263342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:53,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:53,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 16:34:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804146126] [2021-12-22 16:34:53,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:53,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:34:53,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:34:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:34:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=150, Unknown=2, NotChecked=0, Total=182 [2021-12-22 16:34:53,803 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 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 16:35:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:10,546 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-12-22 16:35:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 16:35:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 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 24 [2021-12-22 16:35:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:10,547 INFO L225 Difference]: With dead ends: 40 [2021-12-22 16:35:10,547 INFO L226 Difference]: Without dead ends: 40 [2021-12-22 16:35:10,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=74, Invalid=344, Unknown=2, NotChecked=0, Total=420 [2021-12-22 16:35:10,548 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:10,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 149 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 103 Unchecked, 1.1s Time] [2021-12-22 16:35:10,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-22 16:35:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-22 16:35:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 39 states have internal predecessors, (40), 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 16:35:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-12-22 16:35:10,551 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 24 [2021-12-22 16:35:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:10,551 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-12-22 16:35:10,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 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 16:35:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-12-22 16:35:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 16:35:10,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:10,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:10,564 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 16:35:10,759 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 16:35:10,759 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-22 16:35:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1383043970, now seen corresponding path program 1 times [2021-12-22 16:35:10,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:35:10,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005466256] [2021-12-22 16:35:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:10,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:35:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:35:10,762 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 16:35:10,763 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 16:35:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-22 16:35:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:11,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 16:35:11,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:35:11,050 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 16:35:11,074 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 16:35:11,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 16:35:11,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:35:11,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-22 16:35:11,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:35:11,336 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:35:11,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 56 [2021-12-22 16:35:11,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 16:35:11,501 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:35:11,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 60 [2021-12-22 16:35:11,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 16:35:15,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:35:15,636 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 16:35:15,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 22 [2021-12-22 16:35:15,693 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-22 16:35:15,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 16:35:15,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:35:15,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:35:15,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:35:15,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-22 16:35:15,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:35:15,867 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 16:35:15,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:15,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:35:15,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005466256] [2021-12-22 16:35:15,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005466256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:15,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:15,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 16:35:15,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235728253] [2021-12-22 16:35:15,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:15,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:35:15,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:35:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:35:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=150, Unknown=2, NotChecked=0, Total=182 [2021-12-22 16:35:15,871 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 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)