./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/uthash-2.0.2/uthash_SFH_test2-2.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 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:55:48,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:55:48,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:55:48,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:55:48,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:55:48,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:55:48,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:55:48,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:55:48,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:55:48,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:55:48,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:55:48,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:55:48,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:55:48,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:55:48,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:55:48,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:55:48,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:55:48,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:55:48,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:55:48,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:55:48,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:55:48,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:55:48,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:55:48,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:55:48,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:55:48,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:55:48,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:55:48,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:55:48,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:55:48,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:55:48,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:55:48,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:55:48,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:55:48,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:55:48,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:55:48,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:55:48,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:55:48,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:55:48,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:55:48,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:55:48,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:55:48,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 08:55:48,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:55:48,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:55:48,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:55:48,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:55:48,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:55:48,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:55:48,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:55:48,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:55:48,872 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:55:48,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:55:48,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:55:48,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:55:48,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:55:48,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:55:48,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:55:48,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:55:48,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:55:48,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:55:48,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:55:48,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:55:48,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:55:48,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:55:48,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:55:48,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:55:48,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:55:48,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:55:48,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:55:48,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:55:48,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 08:55:48,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 08:55:48,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:55:48,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2021-12-16 08:55:49,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:55:49,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:55:49,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:55:49,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:55:49,150 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:55:49,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-12-16 08:55:49,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1335a9db/39354d53b32d43cf9f3a8506509dec11/FLAG44d6cdbd1 [2021-12-16 08:55:49,750 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:55:49,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-12-16 08:55:49,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1335a9db/39354d53b32d43cf9f3a8506509dec11/FLAG44d6cdbd1 [2021-12-16 08:55:50,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1335a9db/39354d53b32d43cf9f3a8506509dec11 [2021-12-16 08:55:50,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:55:50,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:55:50,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:55:50,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:55:50,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:55:50,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:55:50" (1/1) ... [2021-12-16 08:55:50,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e4af07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:50, skipping insertion in model container [2021-12-16 08:55:50,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:55:50" (1/1) ... [2021-12-16 08:55:50,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:55:50,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:55:50,552 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-12-16 08:55:50,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-12-16 08:55:50,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:55:50,711 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) [2021-12-16 08:55:50,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76d24866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:50, skipping insertion in model container [2021-12-16 08:55:50,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:55:50,714 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 08:55:50,717 INFO L158 Benchmark]: Toolchain (without parser) took 677.88ms. Allocated memory is still 98.6MB. Free memory was 67.6MB in the beginning and 63.9MB in the end (delta: 3.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:55:50,718 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory is still 56.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 08:55:50,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 673.54ms. Allocated memory is still 98.6MB. Free memory was 67.4MB in the beginning and 63.9MB in the end (delta: 3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 08:55:50,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory is still 56.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 673.54ms. Allocated memory is still 98.6MB. Free memory was 67.4MB in the beginning and 63.9MB in the end (delta: 3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: 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/uthash-2.0.2/uthash_SFH_test2-2.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 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:55:52,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:55:52,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:55:52,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:55:52,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:55:52,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:55:52,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:55:52,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:55:52,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:55:52,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:55:52,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:55:52,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:55:52,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:55:52,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:55:52,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:55:52,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:55:52,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:55:52,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:55:52,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:55:52,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:55:52,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:55:52,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:55:52,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:55:52,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:55:52,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:55:52,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:55:52,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:55:52,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:55:52,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:55:52,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:55:52,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:55:52,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:55:52,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:55:52,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:55:52,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:55:52,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:55:52,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:55:52,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:55:52,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:55:52,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:55:52,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:55:52,634 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 08:55:52,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:55:52,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:55:52,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:55:52,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:55:52,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:55:52,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:55:52,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:55:52,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:55:52,675 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:55:52,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:55:52,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:55:52,676 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:55:52,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:55:52,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:55:52,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:55:52,677 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:55:52,677 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:55:52,678 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:55:52,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:55:52,678 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:55:52,678 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 08:55:52,678 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 08:55:52,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:55:52,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:55:52,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:55:52,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:55:52,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:55:52,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:55:52,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:55:52,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:55:52,680 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 08:55:52,680 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 08:55:52,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:55:52,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 08:55:52,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2021-12-16 08:55:52,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:55:53,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:55:53,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:55:53,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:55:53,008 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:55:53,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-12-16 08:55:53,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a8ed9ae1/b2864655e1dc4d48bab423ce7fac2338/FLAG1d44757f1 [2021-12-16 08:55:53,621 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:55:53,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-12-16 08:55:53,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a8ed9ae1/b2864655e1dc4d48bab423ce7fac2338/FLAG1d44757f1 [2021-12-16 08:55:53,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a8ed9ae1/b2864655e1dc4d48bab423ce7fac2338 [2021-12-16 08:55:53,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:55:53,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:55:53,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:55:53,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:55:53,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:55:53,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:55:53" (1/1) ... [2021-12-16 08:55:53,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e1617a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:53, skipping insertion in model container [2021-12-16 08:55:53,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:55:53" (1/1) ... [2021-12-16 08:55:53,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:55:53,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:55:54,354 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-12-16 08:55:54,472 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-12-16 08:55:54,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:55:54,503 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 08:55:54,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:55:54,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-12-16 08:55:54,614 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-12-16 08:55:54,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:55:54,643 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 08:55:54,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-12-16 08:55:54,723 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-12-16 08:55:54,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:55:54,784 INFO L208 MainTranslator]: Completed translation [2021-12-16 08:55:54,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54 WrapperNode [2021-12-16 08:55:54,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:55:54,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 08:55:54,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 08:55:54,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 08:55:54,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:54,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:54,911 INFO L137 Inliner]: procedures = 211, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1054 [2021-12-16 08:55:54,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 08:55:54,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 08:55:54,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 08:55:54,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 08:55:54,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:54,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:54,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:54,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:54,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:55,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:55,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:55,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 08:55:55,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 08:55:55,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 08:55:55,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 08:55:55,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (1/1) ... [2021-12-16 08:55:55,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:55:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 08:55:55,060 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) [2021-12-16 08:55:55,075 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 [2021-12-16 08:55:55,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-16 08:55:55,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 08:55:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 08:55:55,102 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 08:55:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 08:55:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 08:55:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 08:55:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 08:55:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 08:55:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 08:55:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 08:55:55,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 08:55:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 08:55:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 08:55:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 08:55:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 08:55:55,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 08:55:55,365 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 08:55:55,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 08:55:55,370 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-16 08:55:59,182 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 08:55:59,204 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 08:55:59,204 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-12-16 08:55:59,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:55:59 BoogieIcfgContainer [2021-12-16 08:55:59,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 08:55:59,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 08:55:59,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 08:55:59,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 08:55:59,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:55:53" (1/3) ... [2021-12-16 08:55:59,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a1185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:55:59, skipping insertion in model container [2021-12-16 08:55:59,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:55:54" (2/3) ... [2021-12-16 08:55:59,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a1185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:55:59, skipping insertion in model container [2021-12-16 08:55:59,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:55:59" (3/3) ... [2021-12-16 08:55:59,217 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-2.i [2021-12-16 08:55:59,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 08:55:59,222 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 536 error locations. [2021-12-16 08:55:59,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 08:55:59,275 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 [2021-12-16 08:55:59,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 536 error locations. [2021-12-16 08:55:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 1081 states, 537 states have (on average 2.2364990689013036) internal successors, (1201), 1075 states have internal predecessors, (1201), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 08:55:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:55:59,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:59,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:55:59,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-12-16 08:55:59,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:59,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275057486] [2021-12-16 08:55:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:59,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:59,343 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) [2021-12-16 08:55:59,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 08:55:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:55:59,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:59,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:55:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:55:59,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:59,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275057486] [2021-12-16 08:55:59,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275057486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:59,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:59,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:55:59,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656036775] [2021-12-16 08:55:59,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:55:59,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:55:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:55:59,638 INFO L87 Difference]: Start difference. First operand has 1081 states, 537 states have (on average 2.2364990689013036) internal successors, (1201), 1075 states have internal predecessors, (1201), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) 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) [2021-12-16 08:56:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:01,378 INFO L93 Difference]: Finished difference Result 1245 states and 1321 transitions. [2021-12-16 08:56:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:01,380 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 [2021-12-16 08:56:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:01,397 INFO L225 Difference]: With dead ends: 1245 [2021-12-16 08:56:01,398 INFO L226 Difference]: Without dead ends: 1243 [2021-12-16 08:56:01,399 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 [2021-12-16 08:56:01,402 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 995 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:01,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 805 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 08:56:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-12-16 08:56:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1065. [2021-12-16 08:56:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 537 states have (on average 2.080074487895717) internal successors, (1117), 1059 states have internal predecessors, (1117), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 08:56:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1133 transitions. [2021-12-16 08:56:01,507 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1133 transitions. Word has length 3 [2021-12-16 08:56:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:01,507 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1133 transitions. [2021-12-16 08:56:01,507 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) [2021-12-16 08:56:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1133 transitions. [2021-12-16 08:56:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:56:01,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:01,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:56:01,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:01,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:01,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-12-16 08:56:01,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:01,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225670683] [2021-12-16 08:56:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:01,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:01,721 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) [2021-12-16 08:56:01,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 08:56:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:01,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:56:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:01,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:01,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:01,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:01,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225670683] [2021-12-16 08:56:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225670683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:01,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:01,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:56:01,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717657357] [2021-12-16 08:56:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:01,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:56:01,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:56:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:01,877 INFO L87 Difference]: Start difference. First operand 1065 states and 1133 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) [2021-12-16 08:56:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:04,389 INFO L93 Difference]: Finished difference Result 1483 states and 1593 transitions. [2021-12-16 08:56:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:04,393 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 [2021-12-16 08:56:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:04,399 INFO L225 Difference]: With dead ends: 1483 [2021-12-16 08:56:04,399 INFO L226 Difference]: Without dead ends: 1483 [2021-12-16 08:56:04,399 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 [2021-12-16 08:56:04,400 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 450 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:04,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1540 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-16 08:56:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-12-16 08:56:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1197. [2021-12-16 08:56:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 665 states have (on average 2.037593984962406) internal successors, (1355), 1191 states have internal predecessors, (1355), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1381 transitions. [2021-12-16 08:56:04,433 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1381 transitions. Word has length 3 [2021-12-16 08:56:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:04,434 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1381 transitions. [2021-12-16 08:56:04,434 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) [2021-12-16 08:56:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1381 transitions. [2021-12-16 08:56:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 08:56:04,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:04,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:04,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:04,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:04,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:04,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2021-12-16 08:56:04,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:04,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138880190] [2021-12-16 08:56:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:04,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:04,643 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) [2021-12-16 08:56:04,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 08:56:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:56:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:04,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:04,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:56:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 08:56:04,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:56:04,885 INFO L388 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 14 treesize of output 14 [2021-12-16 08:56:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:04,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:04,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:04,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138880190] [2021-12-16 08:56:04,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138880190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:04,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:04,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:04,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306012377] [2021-12-16 08:56:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:04,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:04,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:04,915 INFO L87 Difference]: Start difference. First operand 1197 states and 1381 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-16 08:56:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:07,733 INFO L93 Difference]: Finished difference Result 1364 states and 1556 transitions. [2021-12-16 08:56:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:56:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-16 08:56:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:07,739 INFO L225 Difference]: With dead ends: 1364 [2021-12-16 08:56:07,739 INFO L226 Difference]: Without dead ends: 1364 [2021-12-16 08:56:07,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:07,740 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 1267 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:07,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 473 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-16 08:56:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-12-16 08:56:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1054. [2021-12-16 08:56:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 537 states have (on average 2.0577281191806334) internal successors, (1105), 1048 states have internal predecessors, (1105), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 08:56:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1121 transitions. [2021-12-16 08:56:07,768 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1121 transitions. Word has length 7 [2021-12-16 08:56:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:07,771 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1121 transitions. [2021-12-16 08:56:07,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-16 08:56:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1121 transitions. [2021-12-16 08:56:07,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 08:56:07,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:07,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:07,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:07,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:07,975 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-12-16 08:56:07,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109212788] [2021-12-16 08:56:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:07,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:07,978 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) [2021-12-16 08:56:07,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 08:56:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:56:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:08,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:08,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:08,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109212788] [2021-12-16 08:56:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109212788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:08,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:56:08,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070320860] [2021-12-16 08:56:08,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:56:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:56:08,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:08,118 INFO L87 Difference]: Start difference. First operand 1054 states and 1121 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-16 08:56:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:09,667 INFO L93 Difference]: Finished difference Result 1230 states and 1328 transitions. [2021-12-16 08:56:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-12-16 08:56:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:09,674 INFO L225 Difference]: With dead ends: 1230 [2021-12-16 08:56:09,674 INFO L226 Difference]: Without dead ends: 1230 [2021-12-16 08:56:09,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:09,676 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 814 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:09,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1183 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 08:56:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-12-16 08:56:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1007. [2021-12-16 08:56:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 537 states have (on average 1.9702048417132216) internal successors, (1058), 1001 states have internal predecessors, (1058), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 08:56:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1074 transitions. [2021-12-16 08:56:09,708 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1074 transitions. Word has length 8 [2021-12-16 08:56:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:09,708 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1074 transitions. [2021-12-16 08:56:09,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-16 08:56:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1074 transitions. [2021-12-16 08:56:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 08:56:09,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:09,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:09,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:09,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:09,918 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-12-16 08:56:09,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212414446] [2021-12-16 08:56:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:09,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:09,921 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) [2021-12-16 08:56:09,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 08:56:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:10,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:56:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:10,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:10,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212414446] [2021-12-16 08:56:10,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212414446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:10,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:10,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:56:10,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355840741] [2021-12-16 08:56:10,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:10,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:56:10,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:56:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:10,073 INFO L87 Difference]: Start difference. First operand 1007 states and 1074 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-16 08:56:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:11,808 INFO L93 Difference]: Finished difference Result 1295 states and 1396 transitions. [2021-12-16 08:56:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-12-16 08:56:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:11,813 INFO L225 Difference]: With dead ends: 1295 [2021-12-16 08:56:11,813 INFO L226 Difference]: Without dead ends: 1295 [2021-12-16 08:56:11,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:11,814 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 499 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:11,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1541 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 08:56:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-12-16 08:56:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1029. [2021-12-16 08:56:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 569 states have (on average 1.9578207381370827) internal successors, (1114), 1023 states have internal predecessors, (1114), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 08:56:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1130 transitions. [2021-12-16 08:56:11,833 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1130 transitions. Word has length 8 [2021-12-16 08:56:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:11,833 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1130 transitions. [2021-12-16 08:56:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-16 08:56:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1130 transitions. [2021-12-16 08:56:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 08:56:11,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:11,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:11,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:12,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:12,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr429REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash 871160987, now seen corresponding path program 1 times [2021-12-16 08:56:12,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:12,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883803097] [2021-12-16 08:56:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:12,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:12,049 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) [2021-12-16 08:56:12,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 08:56:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:56:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:12,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:12,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883803097] [2021-12-16 08:56:12,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883803097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:12,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:12,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297103917] [2021-12-16 08:56:12,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:56:12,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:56:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:12,234 INFO L87 Difference]: Start difference. First operand 1029 states and 1130 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-16 08:56:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:12,424 INFO L93 Difference]: Finished difference Result 1506 states and 1652 transitions. [2021-12-16 08:56:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-12-16 08:56:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:12,429 INFO L225 Difference]: With dead ends: 1506 [2021-12-16 08:56:12,429 INFO L226 Difference]: Without dead ends: 1506 [2021-12-16 08:56:12,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:12,430 INFO L933 BasicCegarLoop]: 1131 mSDtfsCounter, 570 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:12,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 2038 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 08:56:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-16 08:56:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1213. [2021-12-16 08:56:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 748 states have (on average 1.8997326203208555) internal successors, (1421), 1207 states have internal predecessors, (1421), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1447 transitions. [2021-12-16 08:56:12,464 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1447 transitions. Word has length 11 [2021-12-16 08:56:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:12,465 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1447 transitions. [2021-12-16 08:56:12,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-16 08:56:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1447 transitions. [2021-12-16 08:56:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 08:56:12,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:12,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:12,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:12,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2021-12-16 08:56:12,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:12,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46087715] [2021-12-16 08:56:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:12,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:12,677 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) [2021-12-16 08:56:12,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 08:56:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:56:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:12,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:12,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46087715] [2021-12-16 08:56:12,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46087715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:12,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:12,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:12,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832756412] [2021-12-16 08:56:12,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:12,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:56:12,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:56:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:12,833 INFO L87 Difference]: Start difference. First operand 1213 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:12,858 INFO L93 Difference]: Finished difference Result 1367 states and 1587 transitions. [2021-12-16 08:56:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 08:56:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:12,863 INFO L225 Difference]: With dead ends: 1367 [2021-12-16 08:56:12,863 INFO L226 Difference]: Without dead ends: 1367 [2021-12-16 08:56:12,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:12,864 INFO L933 BasicCegarLoop]: 1222 mSDtfsCounter, 404 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:12,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 2044 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:56:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-12-16 08:56:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1153. [2021-12-16 08:56:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 712 states have (on average 1.875) internal successors, (1335), 1147 states have internal predecessors, (1335), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1361 transitions. [2021-12-16 08:56:12,882 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1361 transitions. Word has length 13 [2021-12-16 08:56:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:12,883 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1361 transitions. [2021-12-16 08:56:12,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1361 transitions. [2021-12-16 08:56:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 08:56:12,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:12,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:12,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:13,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:13,093 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr534ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1723272146, now seen corresponding path program 1 times [2021-12-16 08:56:13,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:13,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014121717] [2021-12-16 08:56:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:13,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:13,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:13,095 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) [2021-12-16 08:56:13,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 08:56:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:56:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:13,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:56:13,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:56:13,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:56:13,283 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-12-16 08:56:13,283 INFO L388 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-12-16 08:56:13,325 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-16 08:56:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-12-16 08:56:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:13,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:13,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014121717] [2021-12-16 08:56:13,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014121717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:13,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:13,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:56:13,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411678205] [2021-12-16 08:56:13,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:13,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:13,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:13,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:13,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:13,350 INFO L87 Difference]: Start difference. First operand 1153 states and 1361 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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) [2021-12-16 08:56:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:14,453 INFO L93 Difference]: Finished difference Result 1490 states and 1749 transitions. [2021-12-16 08:56:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:56:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 [2021-12-16 08:56:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:14,457 INFO L225 Difference]: With dead ends: 1490 [2021-12-16 08:56:14,457 INFO L226 Difference]: Without dead ends: 1490 [2021-12-16 08:56:14,457 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 [2021-12-16 08:56:14,458 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 342 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:14,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 2835 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 08:56:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-12-16 08:56:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1152. [2021-12-16 08:56:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 711 states have (on average 1.8748241912798875) internal successors, (1333), 1146 states have internal predecessors, (1333), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1359 transitions. [2021-12-16 08:56:14,479 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1359 transitions. Word has length 14 [2021-12-16 08:56:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:14,479 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1359 transitions. [2021-12-16 08:56:14,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-16 08:56:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1359 transitions. [2021-12-16 08:56:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 08:56:14,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:14,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:14,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:14,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:14,691 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-12-16 08:56:14,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64934408] [2021-12-16 08:56:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:14,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:14,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:14,693 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) [2021-12-16 08:56:14,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 08:56:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:56:14,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:14,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:14,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:14,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64934408] [2021-12-16 08:56:14,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64934408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:14,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:14,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:14,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987599677] [2021-12-16 08:56:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:14,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:56:14,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:56:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:14,856 INFO L87 Difference]: Start difference. First operand 1152 states and 1359 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:14,875 INFO L93 Difference]: Finished difference Result 1092 states and 1273 transitions. [2021-12-16 08:56:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:56:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 08:56:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:14,878 INFO L225 Difference]: With dead ends: 1092 [2021-12-16 08:56:14,879 INFO L226 Difference]: Without dead ends: 1092 [2021-12-16 08:56:14,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:56:14,881 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 943 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:14,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 1006 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:56:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-12-16 08:56:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1092. [2021-12-16 08:56:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 675 states have (on average 1.8474074074074074) internal successors, (1247), 1086 states have internal predecessors, (1247), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1273 transitions. [2021-12-16 08:56:14,902 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1273 transitions. Word has length 18 [2021-12-16 08:56:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:14,902 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1273 transitions. [2021-12-16 08:56:14,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1273 transitions. [2021-12-16 08:56:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 08:56:14,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:14,903 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] [2021-12-16 08:56:14,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:15,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:15,114 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-12-16 08:56:15,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:15,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497399099] [2021-12-16 08:56:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:15,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:15,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:15,115 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) [2021-12-16 08:56:15,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 08:56:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:56:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:15,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:15,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:15,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497399099] [2021-12-16 08:56:15,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497399099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:15,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:15,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:56:15,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472731096] [2021-12-16 08:56:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:15,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:15,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:15,300 INFO L87 Difference]: Start difference. First operand 1092 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-12-16 08:56:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:15,371 INFO L93 Difference]: Finished difference Result 1064 states and 1217 transitions. [2021-12-16 08:56:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:56:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2021-12-16 08:56:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:15,375 INFO L225 Difference]: With dead ends: 1064 [2021-12-16 08:56:15,375 INFO L226 Difference]: Without dead ends: 1064 [2021-12-16 08:56:15,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:15,376 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 914 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:15,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1883 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:56:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-12-16 08:56:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1062. [2021-12-16 08:56:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 659 states have (on average 1.8042488619119879) internal successors, (1189), 1056 states have internal predecessors, (1189), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1215 transitions. [2021-12-16 08:56:15,393 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1215 transitions. Word has length 20 [2021-12-16 08:56:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:15,393 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1215 transitions. [2021-12-16 08:56:15,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-12-16 08:56:15,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1215 transitions. [2021-12-16 08:56:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 08:56:15,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:15,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:15,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:15,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:15,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-12-16 08:56:15,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:15,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224470806] [2021-12-16 08:56:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:15,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:15,607 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) [2021-12-16 08:56:15,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 08:56:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:56:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:15,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:15,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:15,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224470806] [2021-12-16 08:56:15,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224470806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:15,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:15,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182086434] [2021-12-16 08:56:15,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:15,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:15,883 INFO L87 Difference]: Start difference. First operand 1062 states and 1215 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:17,288 INFO L93 Difference]: Finished difference Result 1513 states and 1751 transitions. [2021-12-16 08:56:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:56:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 08:56:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:17,293 INFO L225 Difference]: With dead ends: 1513 [2021-12-16 08:56:17,293 INFO L226 Difference]: Without dead ends: 1513 [2021-12-16 08:56:17,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:17,294 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 1462 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:17,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 1057 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 08:56:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-12-16 08:56:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1058. [2021-12-16 08:56:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 659 states have (on average 1.7921092564491654) internal successors, (1181), 1052 states have internal predecessors, (1181), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1207 transitions. [2021-12-16 08:56:17,310 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1207 transitions. Word has length 34 [2021-12-16 08:56:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:17,310 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1207 transitions. [2021-12-16 08:56:17,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1207 transitions. [2021-12-16 08:56:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 08:56:17,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:17,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:17,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:17,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:17,521 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-12-16 08:56:17,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:17,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361584654] [2021-12-16 08:56:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:17,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:17,523 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) [2021-12-16 08:56:17,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 08:56:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:56:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:17,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:17,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:17,848 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:17,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361584654] [2021-12-16 08:56:17,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361584654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:17,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:17,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:17,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725594046] [2021-12-16 08:56:17,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:17,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:17,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:17,850 INFO L87 Difference]: Start difference. First operand 1058 states and 1207 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:20,273 INFO L93 Difference]: Finished difference Result 1570 states and 1773 transitions. [2021-12-16 08:56:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:56:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 08:56:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:20,278 INFO L225 Difference]: With dead ends: 1570 [2021-12-16 08:56:20,279 INFO L226 Difference]: Without dead ends: 1570 [2021-12-16 08:56:20,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:20,279 INFO L933 BasicCegarLoop]: 1192 mSDtfsCounter, 928 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:20,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 2162 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-16 08:56:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-12-16 08:56:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1054. [2021-12-16 08:56:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 659 states have (on average 1.779969650986343) internal successors, (1173), 1048 states have internal predecessors, (1173), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1199 transitions. [2021-12-16 08:56:20,297 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1199 transitions. Word has length 34 [2021-12-16 08:56:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:20,297 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1199 transitions. [2021-12-16 08:56:20,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:56:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1199 transitions. [2021-12-16 08:56:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 08:56:20,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:20,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:20,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:20,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:20,510 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-12-16 08:56:20,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:20,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340686870] [2021-12-16 08:56:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:20,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:20,512 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) [2021-12-16 08:56:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 08:56:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:56:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:20,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:20,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:20,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340686870] [2021-12-16 08:56:20,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340686870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:20,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:20,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:56:20,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860681003] [2021-12-16 08:56:20,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:20,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:20,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:20,857 INFO L87 Difference]: Start difference. First operand 1054 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-12-16 08:56:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:20,907 INFO L93 Difference]: Finished difference Result 1042 states and 1179 transitions. [2021-12-16 08:56:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:56:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) Word has length 52 [2021-12-16 08:56:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:20,912 INFO L225 Difference]: With dead ends: 1042 [2021-12-16 08:56:20,913 INFO L226 Difference]: Without dead ends: 1042 [2021-12-16 08:56:20,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:20,915 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 890 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:20,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1861 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:56:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-12-16 08:56:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1042. [2021-12-16 08:56:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 647 states have (on average 1.7820710973724885) internal successors, (1153), 1036 states have internal predecessors, (1153), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1179 transitions. [2021-12-16 08:56:20,935 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1179 transitions. Word has length 52 [2021-12-16 08:56:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:20,937 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1179 transitions. [2021-12-16 08:56:20,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-12-16 08:56:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1179 transitions. [2021-12-16 08:56:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 08:56:20,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:20,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:20,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:21,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:21,152 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-12-16 08:56:21,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:21,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510129039] [2021-12-16 08:56:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:21,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:21,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:21,154 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) [2021-12-16 08:56:21,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 08:56:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:56:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:21,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:56:22,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 08:56:22,026 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:56:22,026 INFO L388 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 14 treesize of output 14 [2021-12-16 08:56:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:22,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:22,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510129039] [2021-12-16 08:56:22,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510129039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:22,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:22,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:56:22,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846260573] [2021-12-16 08:56:22,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:22,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:22,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:22,044 INFO L87 Difference]: Start difference. First operand 1042 states and 1179 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 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) [2021-12-16 08:56:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:23,908 INFO L93 Difference]: Finished difference Result 1264 states and 1480 transitions. [2021-12-16 08:56:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:56:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 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) Word has length 60 [2021-12-16 08:56:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:23,912 INFO L225 Difference]: With dead ends: 1264 [2021-12-16 08:56:23,912 INFO L226 Difference]: Without dead ends: 1264 [2021-12-16 08:56:23,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:23,913 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 843 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:23,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 758 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 08:56:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-12-16 08:56:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 972. [2021-12-16 08:56:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 615 states have (on average 1.7056910569105692) internal successors, (1049), 966 states have internal predecessors, (1049), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1075 transitions. [2021-12-16 08:56:23,926 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1075 transitions. Word has length 60 [2021-12-16 08:56:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:23,927 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1075 transitions. [2021-12-16 08:56:23,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 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) [2021-12-16 08:56:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1075 transitions. [2021-12-16 08:56:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 08:56:23,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:23,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:23,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:24,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:24,141 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-12-16 08:56:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103414810] [2021-12-16 08:56:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:24,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:24,144 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) [2021-12-16 08:56:24,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 08:56:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:56:24,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:24,518 INFO L388 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 [2021-12-16 08:56:24,544 INFO L388 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 24 treesize of output 12 [2021-12-16 08:56:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:24,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:24,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103414810] [2021-12-16 08:56:24,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103414810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:24,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:24,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:56:24,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719372064] [2021-12-16 08:56:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:24,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:56:24,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:56:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:24,555 INFO L87 Difference]: Start difference. First operand 972 states and 1075 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-12-16 08:56:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:26,207 INFO L93 Difference]: Finished difference Result 971 states and 1074 transitions. [2021-12-16 08:56:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:56:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-12-16 08:56:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:26,210 INFO L225 Difference]: With dead ends: 971 [2021-12-16 08:56:26,210 INFO L226 Difference]: Without dead ends: 971 [2021-12-16 08:56:26,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:56:26,210 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 4 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:26,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2294 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 08:56:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-12-16 08:56:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 971. [2021-12-16 08:56:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 615 states have (on average 1.7040650406504065) internal successors, (1048), 965 states have internal predecessors, (1048), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1074 transitions. [2021-12-16 08:56:26,222 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1074 transitions. Word has length 65 [2021-12-16 08:56:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:26,222 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1074 transitions. [2021-12-16 08:56:26,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-12-16 08:56:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1074 transitions. [2021-12-16 08:56:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 08:56:26,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:26,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:26,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:26,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:26,435 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-12-16 08:56:26,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208225165] [2021-12-16 08:56:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:26,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:26,438 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:26,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 08:56:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 08:56:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:26,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:56:26,790 INFO L388 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 [2021-12-16 08:56:26,798 INFO L388 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 [2021-12-16 08:56:26,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-16 08:56:26,856 INFO L388 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 [2021-12-16 08:56:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:26,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:26,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:26,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208225165] [2021-12-16 08:56:26,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208225165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:26,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:26,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:56:26,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602686621] [2021-12-16 08:56:26,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:26,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:56:26,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:26,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:56:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:26,874 INFO L87 Difference]: Start difference. First operand 971 states and 1074 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-12-16 08:56:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:28,829 INFO L93 Difference]: Finished difference Result 970 states and 1073 transitions. [2021-12-16 08:56:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:56:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-12-16 08:56:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:28,832 INFO L225 Difference]: With dead ends: 970 [2021-12-16 08:56:28,833 INFO L226 Difference]: Without dead ends: 970 [2021-12-16 08:56:28,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:56:28,833 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 2 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:28,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2330 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 08:56:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-12-16 08:56:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 970. [2021-12-16 08:56:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 614 states have (on average 1.705211726384365) internal successors, (1047), 964 states have internal predecessors, (1047), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 08:56:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1073 transitions. [2021-12-16 08:56:28,852 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1073 transitions. Word has length 65 [2021-12-16 08:56:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:28,853 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1073 transitions. [2021-12-16 08:56:28,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-12-16 08:56:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1073 transitions. [2021-12-16 08:56:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 08:56:28,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:28,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:28,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:29,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:29,067 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:29,068 INFO L85 PathProgramCache]: Analyzing trace with hash 864578415, now seen corresponding path program 1 times [2021-12-16 08:56:29,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:29,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719339404] [2021-12-16 08:56:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:29,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:29,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:29,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 08:56:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:29,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:56:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:29,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:56:29,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:29,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719339404] [2021-12-16 08:56:29,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719339404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:56:29,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:56:29,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:56:29,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400567509] [2021-12-16 08:56:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:56:29,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:56:29,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:56:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:56:29,452 INFO L87 Difference]: Start difference. First operand 970 states and 1073 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:56:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:29,493 INFO L93 Difference]: Finished difference Result 973 states and 1077 transitions. [2021-12-16 08:56:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:56:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-12-16 08:56:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:29,501 INFO L225 Difference]: With dead ends: 973 [2021-12-16 08:56:29,502 INFO L226 Difference]: Without dead ends: 973 [2021-12-16 08:56:29,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:56:29,503 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 2 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:29,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2644 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:56:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-16 08:56:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2021-12-16 08:56:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 616 states have (on average 1.7045454545454546) internal successors, (1050), 967 states have internal predecessors, (1050), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-16 08:56:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1077 transitions. [2021-12-16 08:56:29,524 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1077 transitions. Word has length 73 [2021-12-16 08:56:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:29,525 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1077 transitions. [2021-12-16 08:56:29,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:56:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1077 transitions. [2021-12-16 08:56:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 08:56:29,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:29,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:29,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:29,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:29,739 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1994106300, now seen corresponding path program 1 times [2021-12-16 08:56:29,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:29,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13220228] [2021-12-16 08:56:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:56:29,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:29,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:29,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:29,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 08:56:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:56:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:56:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:30,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:56:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:30,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:30,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13220228] [2021-12-16 08:56:30,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13220228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:56:30,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:56:30,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 08:56:30,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010936949] [2021-12-16 08:56:30,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:56:30,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:56:30,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:56:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:56:30,287 INFO L87 Difference]: Start difference. First operand 973 states and 1077 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:30,458 INFO L93 Difference]: Finished difference Result 985 states and 1094 transitions. [2021-12-16 08:56:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 08:56:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-12-16 08:56:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:30,461 INFO L225 Difference]: With dead ends: 985 [2021-12-16 08:56:30,461 INFO L226 Difference]: Without dead ends: 985 [2021-12-16 08:56:30,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-16 08:56:30,462 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 12 mSDsluCounter, 4396 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5280 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:30,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 5280 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:56:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-12-16 08:56:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2021-12-16 08:56:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 625 states have (on average 1.704) internal successors, (1065), 976 states have internal predecessors, (1065), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-16 08:56:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1092 transitions. [2021-12-16 08:56:30,475 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1092 transitions. Word has length 74 [2021-12-16 08:56:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:30,475 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1092 transitions. [2021-12-16 08:56:30,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1092 transitions. [2021-12-16 08:56:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 08:56:30,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:30,476 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:30,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:30,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:30,689 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash 195761839, now seen corresponding path program 2 times [2021-12-16 08:56:30,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:30,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949072089] [2021-12-16 08:56:30,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:56:30,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:30,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:30,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 08:56:31,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 08:56:31,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:56:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:56:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:31,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:56:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:31,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:31,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949072089] [2021-12-16 08:56:31,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949072089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:56:31,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:56:31,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 08:56:31,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836256537] [2021-12-16 08:56:31,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:56:31,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 08:56:31,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 08:56:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-16 08:56:31,496 INFO L87 Difference]: Start difference. First operand 983 states and 1092 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:32,035 INFO L93 Difference]: Finished difference Result 1004 states and 1120 transitions. [2021-12-16 08:56:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 08:56:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2021-12-16 08:56:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:32,040 INFO L225 Difference]: With dead ends: 1004 [2021-12-16 08:56:32,040 INFO L226 Difference]: Without dead ends: 1000 [2021-12-16 08:56:32,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-12-16 08:56:32,041 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 58 mSDsluCounter, 5296 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6183 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:32,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6183 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:56:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-12-16 08:56:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 992. [2021-12-16 08:56:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 634 states have (on average 1.6987381703470033) internal successors, (1077), 985 states have internal predecessors, (1077), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-16 08:56:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1104 transitions. [2021-12-16 08:56:32,055 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1104 transitions. Word has length 77 [2021-12-16 08:56:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:32,055 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1104 transitions. [2021-12-16 08:56:32,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1104 transitions. [2021-12-16 08:56:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 08:56:32,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:32,056 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:32,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:32,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:32,270 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1311126641, now seen corresponding path program 3 times [2021-12-16 08:56:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106411628] [2021-12-16 08:56:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 08:56:32,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:32,273 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:32,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-16 08:56:32,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 08:56:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:56:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 08:56:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:33,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:56:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:33,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106411628] [2021-12-16 08:56:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106411628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:56:33,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:56:33,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-16 08:56:33,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340321206] [2021-12-16 08:56:33,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:56:33,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 08:56:33,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 08:56:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-16 08:56:33,885 INFO L87 Difference]: Start difference. First operand 992 states and 1104 transitions. Second operand has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:36,396 INFO L93 Difference]: Finished difference Result 1034 states and 1166 transitions. [2021-12-16 08:56:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 08:56:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-12-16 08:56:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:36,400 INFO L225 Difference]: With dead ends: 1034 [2021-12-16 08:56:36,400 INFO L226 Difference]: Without dead ends: 1028 [2021-12-16 08:56:36,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 08:56:36,401 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 196 mSDsluCounter, 9769 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 10661 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:36,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 10661 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 08:56:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-12-16 08:56:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1010. [2021-12-16 08:56:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 652 states have (on average 1.687116564417178) internal successors, (1100), 1003 states have internal predecessors, (1100), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-16 08:56:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1127 transitions. [2021-12-16 08:56:36,416 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1127 transitions. Word has length 83 [2021-12-16 08:56:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:36,416 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1127 transitions. [2021-12-16 08:56:36,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1127 transitions. [2021-12-16 08:56:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 08:56:36,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:36,417 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:36,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:36,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:36,632 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1292614991, now seen corresponding path program 4 times [2021-12-16 08:56:36,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:36,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75153706] [2021-12-16 08:56:36,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 08:56:36,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:36,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:36,634 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:36,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 08:56:36,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 08:56:36,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:56:36,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 08:56:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:56:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:37,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:56:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:56:38,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:56:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75153706] [2021-12-16 08:56:38,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75153706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:56:38,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:56:38,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-16 08:56:38,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461782440] [2021-12-16 08:56:38,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:56:38,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 08:56:38,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:56:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 08:56:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 08:56:38,866 INFO L87 Difference]: Start difference. First operand 1010 states and 1127 transitions. Second operand has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:56:49,491 INFO L93 Difference]: Finished difference Result 1090 states and 1239 transitions. [2021-12-16 08:56:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 08:56:49,492 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 95 [2021-12-16 08:56:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:56:49,496 INFO L225 Difference]: With dead ends: 1090 [2021-12-16 08:56:49,496 INFO L226 Difference]: Without dead ends: 1086 [2021-12-16 08:56:49,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2021-12-16 08:56:49,502 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 535 mSDsluCounter, 20704 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 21608 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:56:49,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 21608 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 08:56:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-12-16 08:56:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1044. [2021-12-16 08:56:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 686 states have (on average 1.6705539358600583) internal successors, (1146), 1037 states have internal predecessors, (1146), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-16 08:56:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1173 transitions. [2021-12-16 08:56:49,529 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1173 transitions. Word has length 95 [2021-12-16 08:56:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:56:49,530 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1173 transitions. [2021-12-16 08:56:49,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:56:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1173 transitions. [2021-12-16 08:56:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 08:56:49,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:56:49,531 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:56:49,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 08:56:49,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:56:49,747 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:56:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:56:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1355651281, now seen corresponding path program 5 times [2021-12-16 08:56:49,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:56:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876946865] [2021-12-16 08:56:49,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:56:49,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:56:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:56:49,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:56:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process