./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.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/ldv-memsafety/memleaks_test23_3.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 b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:18:40,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:18:40,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:18:40,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:18:40,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:18:40,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:18:40,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:18:40,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:18:40,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:18:40,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:18:40,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:18:40,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:18:40,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:18:40,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:18:40,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:18:40,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:18:40,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:18:40,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:18:40,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:18:40,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:18:40,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:18:40,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:18:40,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:18:40,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:18:40,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:18:40,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:18:40,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:18:40,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:18:40,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:18:40,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:18:40,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:18:40,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:18:40,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:18:40,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:18:40,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:18:40,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:18:40,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:18:40,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:18:40,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:18:40,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:18:40,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:18:40,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:18:40,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:18:40,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:18:40,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:18:40,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:18:40,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:18:40,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:18:40,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:18:40,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:18:40,170 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:18:40,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:18:40,171 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:18:40,171 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:18:40,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:18:40,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:18:40,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:18:40,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:18:40,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:18:40,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:18:40,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:18:40,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:18:40,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:18:40,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:18:40,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:18:40,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:18:40,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 [2021-12-18 21:18:40,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:18:40,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:18:40,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:18:40,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:18:40,387 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:18:40,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2021-12-18 21:18:40,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4c24c6e1/002d443264c640a2b0faa54afcba6c73/FLAG93b4a0ba3 [2021-12-18 21:18:40,880 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:18:40,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2021-12-18 21:18:40,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4c24c6e1/002d443264c640a2b0faa54afcba6c73/FLAG93b4a0ba3 [2021-12-18 21:18:40,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4c24c6e1/002d443264c640a2b0faa54afcba6c73 [2021-12-18 21:18:40,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:18:40,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:18:40,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:18:40,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:18:40,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:18:40,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:18:40" (1/1) ... [2021-12-18 21:18:40,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc51137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:40, skipping insertion in model container [2021-12-18 21:18:40,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:18:40" (1/1) ... [2021-12-18 21:18:40,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:18:40,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:18:41,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:18:41,239 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) [2021-12-18 21:18:41,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2770f32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:41, skipping insertion in model container [2021-12-18 21:18:41,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:18:41,240 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:18:41,241 INFO L158 Benchmark]: Toolchain (without parser) took 340.15ms. Allocated memory is still 104.9MB. Free memory was 82.4MB in the beginning and 68.2MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 21:18:41,242 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:18:41,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.76ms. Allocated memory is still 104.9MB. Free memory was 82.2MB in the beginning and 68.2MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 21:18:41,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.76ms. Allocated memory is still 104.9MB. Free memory was 82.2MB in the beginning and 68.2MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.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 b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:18:42,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:18:42,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:18:42,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:18:42,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:18:42,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:18:42,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:18:42,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:18:42,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:18:42,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:18:42,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:18:42,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:18:42,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:18:42,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:18:42,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:18:42,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:18:42,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:18:42,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:18:42,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:18:42,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:18:42,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:18:42,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:18:42,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:18:42,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:18:42,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:18:42,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:18:42,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:18:42,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:18:42,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:18:42,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:18:42,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:18:42,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:18:42,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:18:42,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:18:42,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:18:42,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:18:42,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:18:42,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:18:42,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:18:42,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:18:42,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:18:42,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:18:42,834 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:18:42,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:18:42,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:18:42,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:18:42,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:18:42,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:18:42,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:18:42,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:18:42,837 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:18:42,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:18:42,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:18:42,838 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:18:42,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:18:42,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:18:42,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:18:42,839 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:18:42,839 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:18:42,839 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:18:42,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:18:42,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:18:42,840 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:18:42,840 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:18:42,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:18:42,840 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:18:42,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:18:42,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:18:42,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:18:42,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:18:42,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:18:42,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:18:42,848 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:18:42,848 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:18:42,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:18:42,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:18:42,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b04cfdc033f25419ae30b8c067b1e8de34cd963e91f12bceeafd05a3d125e0b7 [2021-12-18 21:18:43,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:18:43,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:18:43,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:18:43,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:18:43,120 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:18:43,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2021-12-18 21:18:43,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4d58499e/8bfe7bafc9b1479ba49fbf2e08e938b5/FLAG04766ecca [2021-12-18 21:18:43,623 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:18:43,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test23_3.i [2021-12-18 21:18:43,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4d58499e/8bfe7bafc9b1479ba49fbf2e08e938b5/FLAG04766ecca [2021-12-18 21:18:44,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4d58499e/8bfe7bafc9b1479ba49fbf2e08e938b5 [2021-12-18 21:18:44,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:18:44,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:18:44,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:18:44,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:18:44,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:18:44,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4bfd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44, skipping insertion in model container [2021-12-18 21:18:44,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:18:44,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:18:44,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:18:44,603 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:18:44,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:18:44,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:18:44,694 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:18:44,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:18:44,802 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:18:44,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44 WrapperNode [2021-12-18 21:18:44,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:18:44,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:18:44,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:18:44,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:18:44,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,883 INFO L137 Inliner]: procedures = 174, calls = 117, calls flagged for inlining = 29, calls inlined = 14, statements flattened = 187 [2021-12-18 21:18:44,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:18:44,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:18:44,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:18:44,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:18:44,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:18:44,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:18:44,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:18:44,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:18:44,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (1/1) ... [2021-12-18 21:18:44,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:18:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:18:44,961 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) [2021-12-18 21:18:44,967 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 [2021-12-18 21:18:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 21:18:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-18 21:18:45,003 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-18 21:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-18 21:18:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-18 21:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:18:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure free_reports [2021-12-18 21:18:45,005 INFO L138 BoogieDeclarations]: Found implementation of procedure free_reports [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:18:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 21:18:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:18:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:18:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-12-18 21:18:45,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-12-18 21:18:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-18 21:18:45,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-18 21:18:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:18:45,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:18:45,159 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:18:45,160 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:18:45,697 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:18:45,702 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:18:45,706 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 21:18:45,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:18:45 BoogieIcfgContainer [2021-12-18 21:18:45,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:18:45,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:18:45,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:18:45,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:18:45,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:18:44" (1/3) ... [2021-12-18 21:18:45,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403d3750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:18:45, skipping insertion in model container [2021-12-18 21:18:45,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:18:44" (2/3) ... [2021-12-18 21:18:45,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403d3750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:18:45, skipping insertion in model container [2021-12-18 21:18:45,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:18:45" (3/3) ... [2021-12-18 21:18:45,715 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test23_3.i [2021-12-18 21:18:45,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:18:45,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2021-12-18 21:18:45,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:18:45,763 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 [2021-12-18 21:18:45,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2021-12-18 21:18:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 108 states have (on average 1.8425925925925926) internal successors, (199), 184 states have internal predecessors, (199), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 21:18:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:18:45,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:45,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:45,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1617164409, now seen corresponding path program 1 times [2021-12-18 21:18:45,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:45,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551269733] [2021-12-18 21:18:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:45,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:45,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:45,793 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) [2021-12-18 21:18:45,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:18:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:18:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:45,982 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 [2021-12-18 21:18:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:46,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:46,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:46,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551269733] [2021-12-18 21:18:46,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551269733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:46,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:46,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:46,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564683325] [2021-12-18 21:18:46,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:46,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:18:46,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:18:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:46,081 INFO L87 Difference]: Start difference. First operand has 199 states, 108 states have (on average 1.8425925925925926) internal successors, (199), 184 states have internal predecessors, (199), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:18:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:46,743 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2021-12-18 21:18:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:18:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:18:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:46,755 INFO L225 Difference]: With dead ends: 226 [2021-12-18 21:18:46,755 INFO L226 Difference]: Without dead ends: 222 [2021-12-18 21:18:46,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:46,759 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 28 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:46,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 825 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 21:18:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-18 21:18:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 206. [2021-12-18 21:18:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 114 states have (on average 1.7894736842105263) internal successors, (204), 189 states have internal predecessors, (204), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-18 21:18:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 223 transitions. [2021-12-18 21:18:46,800 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 223 transitions. Word has length 12 [2021-12-18 21:18:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:46,800 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 223 transitions. [2021-12-18 21:18:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:18:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 223 transitions. [2021-12-18 21:18:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:18:46,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:46,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:46,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:47,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:47,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1617164410, now seen corresponding path program 1 times [2021-12-18 21:18:47,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:47,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322894513] [2021-12-18 21:18:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:47,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:47,012 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) [2021-12-18 21:18:47,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:18:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:18:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:47,092 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 [2021-12-18 21:18:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:47,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:47,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:47,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322894513] [2021-12-18 21:18:47,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322894513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:47,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:47,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:18:47,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297585844] [2021-12-18 21:18:47,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:47,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:18:47,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:18:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:47,175 INFO L87 Difference]: Start difference. First operand 206 states and 223 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:18:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:47,805 INFO L93 Difference]: Finished difference Result 231 states and 247 transitions. [2021-12-18 21:18:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:18:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:18:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:47,813 INFO L225 Difference]: With dead ends: 231 [2021-12-18 21:18:47,813 INFO L226 Difference]: Without dead ends: 231 [2021-12-18 21:18:47,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:18:47,814 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 35 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:47,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1071 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 21:18:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-18 21:18:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 206. [2021-12-18 21:18:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 114 states have (on average 1.7719298245614035) internal successors, (202), 189 states have internal predecessors, (202), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-18 21:18:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2021-12-18 21:18:47,826 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 12 [2021-12-18 21:18:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:47,827 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2021-12-18 21:18:47,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:18:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2021-12-18 21:18:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:18:47,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:47,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:47,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-18 21:18:48,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:48,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash -934992552, now seen corresponding path program 1 times [2021-12-18 21:18:48,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:48,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30963948] [2021-12-18 21:18:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:48,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:48,031 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) [2021-12-18 21:18:48,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:18:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:18:48,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:48,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:48,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:48,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30963948] [2021-12-18 21:18:48,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30963948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:48,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:48,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:18:48,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954857766] [2021-12-18 21:18:48,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:48,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:18:48,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:18:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:18:48,150 INFO L87 Difference]: Start difference. First operand 206 states and 221 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:18:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:48,183 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2021-12-18 21:18:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:18:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:18:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:48,185 INFO L225 Difference]: With dead ends: 218 [2021-12-18 21:18:48,185 INFO L226 Difference]: Without dead ends: 218 [2021-12-18 21:18:48,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:18:48,187 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 20 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:48,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 822 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:18:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-18 21:18:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2021-12-18 21:18:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.7636363636363637) internal successors, (194), 181 states have internal predecessors, (194), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 21:18:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 211 transitions. [2021-12-18 21:18:48,196 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 211 transitions. Word has length 12 [2021-12-18 21:18:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:48,196 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 211 transitions. [2021-12-18 21:18:48,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:18:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 211 transitions. [2021-12-18 21:18:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:18:48,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:48,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:48,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:48,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:48,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:48,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1617078937, now seen corresponding path program 1 times [2021-12-18 21:18:48,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:48,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223542117] [2021-12-18 21:18:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:48,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:48,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:48,412 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) [2021-12-18 21:18:48,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:18:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:18:48,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:48,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:48,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:48,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223542117] [2021-12-18 21:18:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223542117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:48,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:18:48,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675989477] [2021-12-18 21:18:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:18:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:18:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:18:48,515 INFO L87 Difference]: Start difference. First operand 197 states and 211 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-18 21:18:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:48,541 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2021-12-18 21:18:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:18:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-12-18 21:18:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:48,542 INFO L225 Difference]: With dead ends: 218 [2021-12-18 21:18:48,542 INFO L226 Difference]: Without dead ends: 218 [2021-12-18 21:18:48,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:18:48,545 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 123 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:48,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 760 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:18:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-18 21:18:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2021-12-18 21:18:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.7545454545454546) internal successors, (193), 181 states have internal predecessors, (193), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 21:18:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 210 transitions. [2021-12-18 21:18:48,554 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 210 transitions. Word has length 12 [2021-12-18 21:18:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:48,560 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 210 transitions. [2021-12-18 21:18:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-18 21:18:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 210 transitions. [2021-12-18 21:18:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:18:48,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:48,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:48,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:48,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:48,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash -935078024, now seen corresponding path program 1 times [2021-12-18 21:18:48,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709972860] [2021-12-18 21:18:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:48,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:48,770 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) [2021-12-18 21:18:48,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:18:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:48,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:18:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:48,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:48,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:48,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709972860] [2021-12-18 21:18:48,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709972860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:48,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:48,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:18:48,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745803084] [2021-12-18 21:18:48,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:48,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:18:48,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:18:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:18:48,846 INFO L87 Difference]: Start difference. First operand 197 states and 210 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-18 21:18:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:48,870 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2021-12-18 21:18:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:18:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2021-12-18 21:18:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:48,873 INFO L225 Difference]: With dead ends: 202 [2021-12-18 21:18:48,873 INFO L226 Difference]: Without dead ends: 202 [2021-12-18 21:18:48,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:48,874 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 106 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:48,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 708 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:18:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-18 21:18:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-12-18 21:18:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 112 states have (on average 1.7410714285714286) internal successors, (195), 183 states have internal predecessors, (195), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 21:18:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2021-12-18 21:18:48,879 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 12 [2021-12-18 21:18:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:48,880 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2021-12-18 21:18:48,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-18 21:18:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2021-12-18 21:18:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 21:18:48,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:48,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:48,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 21:18:49,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:49,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1077372438, now seen corresponding path program 1 times [2021-12-18 21:18:49,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131201688] [2021-12-18 21:18:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:49,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:49,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:49,092 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) [2021-12-18 21:18:49,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 21:18:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:18:49,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:49,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:49,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131201688] [2021-12-18 21:18:49,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131201688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:49,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:49,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:18:49,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325729892] [2021-12-18 21:18:49,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:49,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:18:49,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:18:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:18:49,184 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-18 21:18:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:49,423 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2021-12-18 21:18:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:18:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2021-12-18 21:18:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:49,425 INFO L225 Difference]: With dead ends: 211 [2021-12-18 21:18:49,425 INFO L226 Difference]: Without dead ends: 203 [2021-12-18 21:18:49,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:18:49,426 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 51 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:49,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 388 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:18:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-18 21:18:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 193. [2021-12-18 21:18:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 107 states have (on average 1.766355140186916) internal successors, (189), 178 states have internal predecessors, (189), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 21:18:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 205 transitions. [2021-12-18 21:18:49,430 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 205 transitions. Word has length 13 [2021-12-18 21:18:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:49,430 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 205 transitions. [2021-12-18 21:18:49,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-18 21:18:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 205 transitions. [2021-12-18 21:18:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:18:49,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:49,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:49,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:49,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:49,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash 609549957, now seen corresponding path program 1 times [2021-12-18 21:18:49,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:49,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353985371] [2021-12-18 21:18:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:49,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:49,640 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) [2021-12-18 21:18:49,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:18:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:18:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:18:49,839 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 [2021-12-18 21:18:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:49,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:49,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:49,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353985371] [2021-12-18 21:18:49,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353985371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:49,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:49,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:49,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880183291] [2021-12-18 21:18:49,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:49,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:18:49,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:18:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:49,901 INFO L87 Difference]: Start difference. First operand 193 states and 205 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:18:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:50,513 INFO L93 Difference]: Finished difference Result 203 states and 218 transitions. [2021-12-18 21:18:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:18:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-18 21:18:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:50,514 INFO L225 Difference]: With dead ends: 203 [2021-12-18 21:18:50,514 INFO L226 Difference]: Without dead ends: 203 [2021-12-18 21:18:50,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:18:50,515 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 58 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:50,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 592 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 443 Invalid, 0 Unknown, 120 Unchecked, 0.5s Time] [2021-12-18 21:18:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-18 21:18:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 192. [2021-12-18 21:18:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 177 states have internal predecessors, (188), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 21:18:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 204 transitions. [2021-12-18 21:18:50,519 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 204 transitions. Word has length 16 [2021-12-18 21:18:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 204 transitions. [2021-12-18 21:18:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:18:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 204 transitions. [2021-12-18 21:18:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:18:50,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:50,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:50,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:50,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:50,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 609549956, now seen corresponding path program 1 times [2021-12-18 21:18:50,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960314093] [2021-12-18 21:18:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:50,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:50,727 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) [2021-12-18 21:18:50,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:18:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:18:50,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:50,904 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:18:50,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:18:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:50,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:50,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:50,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960314093] [2021-12-18 21:18:50,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960314093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:50,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:50,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:18:50,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219243492] [2021-12-18 21:18:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:50,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:18:50,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:18:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:50,968 INFO L87 Difference]: Start difference. First operand 192 states and 204 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:18:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:51,406 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-12-18 21:18:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:18:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-12-18 21:18:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:51,407 INFO L225 Difference]: With dead ends: 244 [2021-12-18 21:18:51,407 INFO L226 Difference]: Without dead ends: 244 [2021-12-18 21:18:51,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:18:51,408 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 195 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:51,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 528 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 360 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2021-12-18 21:18:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-18 21:18:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 202. [2021-12-18 21:18:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 116 states have (on average 1.7413793103448276) internal successors, (202), 186 states have internal predecessors, (202), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:18:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 220 transitions. [2021-12-18 21:18:51,412 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 220 transitions. Word has length 16 [2021-12-18 21:18:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:51,413 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 220 transitions. [2021-12-18 21:18:51,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:18:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 220 transitions. [2021-12-18 21:18:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:18:51,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:51,413 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] [2021-12-18 21:18:51,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:51,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:51,625 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1600340348, now seen corresponding path program 1 times [2021-12-18 21:18:51,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:51,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085761190] [2021-12-18 21:18:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:51,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:51,634 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) [2021-12-18 21:18:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:18:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:18:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:51,780 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 [2021-12-18 21:18:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:51,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:51,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:51,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085761190] [2021-12-18 21:18:51,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085761190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:51,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:51,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:18:51,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69436491] [2021-12-18 21:18:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:51,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:18:51,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:51,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:18:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:18:51,810 INFO L87 Difference]: Start difference. First operand 202 states and 220 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:52,200 INFO L93 Difference]: Finished difference Result 252 states and 278 transitions. [2021-12-18 21:18:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:18:52,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-12-18 21:18:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:52,201 INFO L225 Difference]: With dead ends: 252 [2021-12-18 21:18:52,201 INFO L226 Difference]: Without dead ends: 252 [2021-12-18 21:18:52,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:52,202 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 65 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:52,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 633 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:18:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-18 21:18:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 227. [2021-12-18 21:18:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 143 states have (on average 1.7622377622377623) internal successors, (252), 211 states have internal predecessors, (252), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:18:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-12-18 21:18:52,207 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 25 [2021-12-18 21:18:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:52,207 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-12-18 21:18:52,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-12-18 21:18:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:18:52,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:52,208 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] [2021-12-18 21:18:52,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:52,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:52,411 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1600340347, now seen corresponding path program 1 times [2021-12-18 21:18:52,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:52,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875137777] [2021-12-18 21:18:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:52,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:52,413 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) [2021-12-18 21:18:52,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:18:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:18:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:52,514 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 [2021-12-18 21:18:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:52,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:52,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:52,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875137777] [2021-12-18 21:18:52,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875137777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:52,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:52,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:18:52,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087952786] [2021-12-18 21:18:52,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:18:52,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:18:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:18:52,566 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:53,057 INFO L93 Difference]: Finished difference Result 284 states and 313 transitions. [2021-12-18 21:18:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:18:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-12-18 21:18:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:53,058 INFO L225 Difference]: With dead ends: 284 [2021-12-18 21:18:53,058 INFO L226 Difference]: Without dead ends: 284 [2021-12-18 21:18:53,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:53,059 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 99 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:53,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 631 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:18:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-18 21:18:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 229. [2021-12-18 21:18:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.7397260273972603) internal successors, (254), 212 states have internal predecessors, (254), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 275 transitions. [2021-12-18 21:18:53,064 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 275 transitions. Word has length 25 [2021-12-18 21:18:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:53,064 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 275 transitions. [2021-12-18 21:18:53,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 275 transitions. [2021-12-18 21:18:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:18:53,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:53,065 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] [2021-12-18 21:18:53,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:53,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:53,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash -328716411, now seen corresponding path program 1 times [2021-12-18 21:18:53,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083785065] [2021-12-18 21:18:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:53,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:53,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:53,278 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) [2021-12-18 21:18:53,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:18:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 21:18:53,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:53,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:53,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:53,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083785065] [2021-12-18 21:18:53,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083785065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:53,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:53,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:53,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262985168] [2021-12-18 21:18:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:53,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:18:53,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:18:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:18:53,402 INFO L87 Difference]: Start difference. First operand 229 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:53,461 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2021-12-18 21:18:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:18:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2021-12-18 21:18:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:53,463 INFO L225 Difference]: With dead ends: 229 [2021-12-18 21:18:53,463 INFO L226 Difference]: Without dead ends: 229 [2021-12-18 21:18:53,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:53,463 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 114 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:53,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 810 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:18:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-18 21:18:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-12-18 21:18:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.7328767123287672) internal successors, (253), 212 states have internal predecessors, (253), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2021-12-18 21:18:53,472 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 27 [2021-12-18 21:18:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:53,472 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2021-12-18 21:18:53,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2021-12-18 21:18:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:18:53,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:53,483 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] [2021-12-18 21:18:53,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:53,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:53,684 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash -444952336, now seen corresponding path program 1 times [2021-12-18 21:18:53,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665702841] [2021-12-18 21:18:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:53,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:53,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:53,686 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) [2021-12-18 21:18:53,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:18:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:18:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:53,829 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 [2021-12-18 21:18:53,895 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:18:53,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-18 21:18:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:53,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:53,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665702841] [2021-12-18 21:18:53,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665702841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:53,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:53,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:18:53,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371973366] [2021-12-18 21:18:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:18:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:18:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:53,954 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:18:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:54,405 INFO L93 Difference]: Finished difference Result 302 states and 335 transitions. [2021-12-18 21:18:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:18:54,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-12-18 21:18:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:54,407 INFO L225 Difference]: With dead ends: 302 [2021-12-18 21:18:54,407 INFO L226 Difference]: Without dead ends: 302 [2021-12-18 21:18:54,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:18:54,408 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 211 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:54,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 664 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 360 Invalid, 0 Unknown, 276 Unchecked, 0.4s Time] [2021-12-18 21:18:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-18 21:18:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 226. [2021-12-18 21:18:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 146 states have (on average 1.6849315068493151) internal successors, (246), 209 states have internal predecessors, (246), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 267 transitions. [2021-12-18 21:18:54,412 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 267 transitions. Word has length 33 [2021-12-18 21:18:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:54,413 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 267 transitions. [2021-12-18 21:18:54,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:18:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 267 transitions. [2021-12-18 21:18:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:18:54,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:54,413 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] [2021-12-18 21:18:54,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:54,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:54,621 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash -444952335, now seen corresponding path program 1 times [2021-12-18 21:18:54,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:54,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226043976] [2021-12-18 21:18:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:54,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:54,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:54,623 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) [2021-12-18 21:18:54,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 21:18:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:18:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:54,769 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 [2021-12-18 21:18:54,773 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 [2021-12-18 21:18:54,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:18:54,858 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 [2021-12-18 21:18:54,865 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:18:54,865 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 [2021-12-18 21:18:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:54,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:54,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226043976] [2021-12-18 21:18:54,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226043976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:54,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:54,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104408027] [2021-12-18 21:18:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:54,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:18:54,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:18:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:54,933 INFO L87 Difference]: Start difference. First operand 226 states and 267 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:18:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:55,555 INFO L93 Difference]: Finished difference Result 281 states and 310 transitions. [2021-12-18 21:18:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:18:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-12-18 21:18:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:55,557 INFO L225 Difference]: With dead ends: 281 [2021-12-18 21:18:55,557 INFO L226 Difference]: Without dead ends: 281 [2021-12-18 21:18:55,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:55,557 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 180 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:55,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 529 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 476 Invalid, 0 Unknown, 154 Unchecked, 0.6s Time] [2021-12-18 21:18:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-18 21:18:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 226. [2021-12-18 21:18:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 146 states have (on average 1.6575342465753424) internal successors, (242), 209 states have internal predecessors, (242), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2021-12-18 21:18:55,563 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 33 [2021-12-18 21:18:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:55,563 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2021-12-18 21:18:55,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:18:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2021-12-18 21:18:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 21:18:55,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:55,564 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] [2021-12-18 21:18:55,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:55,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:55,773 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1897494371, now seen corresponding path program 1 times [2021-12-18 21:18:55,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:55,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202869112] [2021-12-18 21:18:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:55,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:55,775 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) [2021-12-18 21:18:55,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:18:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:55,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:18:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:55,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:55,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202869112] [2021-12-18 21:18:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202869112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:55,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:55,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:18:55,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526973727] [2021-12-18 21:18:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:55,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:18:55,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:55,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:18:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:18:55,948 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:55,962 INFO L93 Difference]: Finished difference Result 268 states and 309 transitions. [2021-12-18 21:18:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:18:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-12-18 21:18:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:55,964 INFO L225 Difference]: With dead ends: 268 [2021-12-18 21:18:55,964 INFO L226 Difference]: Without dead ends: 268 [2021-12-18 21:18:55,964 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 [2021-12-18 21:18:55,965 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 36 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:55,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 577 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:18:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-18 21:18:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 230. [2021-12-18 21:18:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 150 states have (on average 1.64) internal successors, (246), 213 states have internal predecessors, (246), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2021-12-18 21:18:55,972 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 35 [2021-12-18 21:18:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:55,973 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2021-12-18 21:18:55,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2021-12-18 21:18:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:18:55,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:55,977 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] [2021-12-18 21:18:55,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:56,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:56,183 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1307216555, now seen corresponding path program 1 times [2021-12-18 21:18:56,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456084901] [2021-12-18 21:18:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:56,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:56,189 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) [2021-12-18 21:18:56,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:18:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:18:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:56,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:56,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:56,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456084901] [2021-12-18 21:18:56,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456084901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:56,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:56,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:56,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041339670] [2021-12-18 21:18:56,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:56,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:18:56,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:56,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:18:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:56,599 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:18:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:56,620 INFO L93 Difference]: Finished difference Result 313 states and 354 transitions. [2021-12-18 21:18:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:18:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-18 21:18:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:56,621 INFO L225 Difference]: With dead ends: 313 [2021-12-18 21:18:56,621 INFO L226 Difference]: Without dead ends: 313 [2021-12-18 21:18:56,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:18:56,622 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 133 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:56,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 747 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 97 Unchecked, 0.0s Time] [2021-12-18 21:18:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-18 21:18:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 249. [2021-12-18 21:18:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 168 states have (on average 1.5833333333333333) internal successors, (266), 231 states have internal predecessors, (266), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-12-18 21:18:56,627 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 36 [2021-12-18 21:18:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:56,627 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-12-18 21:18:56,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:18:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-12-18 21:18:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:18:56,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:56,628 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] [2021-12-18 21:18:56,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:56,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:56,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:56,835 INFO L85 PathProgramCache]: Analyzing trace with hash 359927496, now seen corresponding path program 1 times [2021-12-18 21:18:56,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:56,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652704242] [2021-12-18 21:18:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:56,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:56,837 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) [2021-12-18 21:18:56,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:18:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:18:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:56,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:56,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652704242] [2021-12-18 21:18:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652704242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:56,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:56,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:18:56,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902857379] [2021-12-18 21:18:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:56,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:18:56,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:18:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:18:56,985 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:57,002 INFO L93 Difference]: Finished difference Result 272 states and 312 transitions. [2021-12-18 21:18:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:18:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-18 21:18:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:57,003 INFO L225 Difference]: With dead ends: 272 [2021-12-18 21:18:57,003 INFO L226 Difference]: Without dead ends: 272 [2021-12-18 21:18:57,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:18:57,004 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 43 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:57,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 575 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:18:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-18 21:18:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 251. [2021-12-18 21:18:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 170 states have (on average 1.576470588235294) internal successors, (268), 233 states have internal predecessors, (268), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 289 transitions. [2021-12-18 21:18:57,008 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 289 transitions. Word has length 40 [2021-12-18 21:18:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:57,009 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 289 transitions. [2021-12-18 21:18:57,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 289 transitions. [2021-12-18 21:18:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:18:57,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:57,009 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] [2021-12-18 21:18:57,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:57,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:57,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2125965028, now seen corresponding path program 1 times [2021-12-18 21:18:57,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:57,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254281431] [2021-12-18 21:18:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:57,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:57,218 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) [2021-12-18 21:18:57,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:18:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:57,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:18:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:57,393 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 [2021-12-18 21:18:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:57,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:57,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:57,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254281431] [2021-12-18 21:18:57,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254281431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:57,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:57,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:57,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992860588] [2021-12-18 21:18:57,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:57,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:18:57,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:18:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:57,456 INFO L87 Difference]: Start difference. First operand 251 states and 289 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:58,016 INFO L93 Difference]: Finished difference Result 294 states and 325 transitions. [2021-12-18 21:18:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:18:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-12-18 21:18:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:58,017 INFO L225 Difference]: With dead ends: 294 [2021-12-18 21:18:58,018 INFO L226 Difference]: Without dead ends: 294 [2021-12-18 21:18:58,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:18:58,018 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 125 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:58,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 812 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:18:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-18 21:18:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 250. [2021-12-18 21:18:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 170 states have (on average 1.5588235294117647) internal successors, (265), 232 states have internal predecessors, (265), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 286 transitions. [2021-12-18 21:18:58,023 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 286 transitions. Word has length 42 [2021-12-18 21:18:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:58,023 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 286 transitions. [2021-12-18 21:18:58,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 286 transitions. [2021-12-18 21:18:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:18:58,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:58,024 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] [2021-12-18 21:18:58,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:58,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:58,225 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2125965027, now seen corresponding path program 1 times [2021-12-18 21:18:58,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:58,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78849293] [2021-12-18 21:18:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:58,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:58,227 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) [2021-12-18 21:18:58,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:18:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:18:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:58,404 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 [2021-12-18 21:18:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:18:58,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:18:58,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78849293] [2021-12-18 21:18:58,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78849293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:18:58,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:18:58,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:18:58,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180480578] [2021-12-18 21:18:58,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:18:58,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:18:58,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:58,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:18:58,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:18:58,555 INFO L87 Difference]: Start difference. First operand 250 states and 286 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:59,321 INFO L93 Difference]: Finished difference Result 319 states and 350 transitions. [2021-12-18 21:18:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:18:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-12-18 21:18:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:59,323 INFO L225 Difference]: With dead ends: 319 [2021-12-18 21:18:59,323 INFO L226 Difference]: Without dead ends: 319 [2021-12-18 21:18:59,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:18:59,324 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 146 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:59,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 845 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 21:18:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-18 21:18:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 250. [2021-12-18 21:18:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 170 states have (on average 1.5470588235294118) internal successors, (263), 232 states have internal predecessors, (263), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:18:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 284 transitions. [2021-12-18 21:18:59,329 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 284 transitions. Word has length 42 [2021-12-18 21:18:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:59,329 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 284 transitions. [2021-12-18 21:18:59,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:18:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 284 transitions. [2021-12-18 21:18:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:18:59,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:59,330 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] [2021-12-18 21:18:59,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:59,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:59,551 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:18:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953137, now seen corresponding path program 1 times [2021-12-18 21:18:59,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:59,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576060032] [2021-12-18 21:18:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:18:59,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:59,553 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) [2021-12-18 21:18:59,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 21:18:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:18:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:18:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:59,861 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:18:59,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 21:19:00,211 INFO L354 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2021-12-18 21:19:00,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 42 [2021-12-18 21:19:00,597 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:19:00,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 47 [2021-12-18 21:19:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:01,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:01,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:01,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 37 [2021-12-18 21:19:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:01,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:01,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576060032] [2021-12-18 21:19:01,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576060032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:01,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:01,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 21:19:01,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898112513] [2021-12-18 21:19:01,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:01,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 21:19:01,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 21:19:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:19:01,338 INFO L87 Difference]: Start difference. First operand 250 states and 284 transitions. Second operand has 17 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:01,761 INFO L93 Difference]: Finished difference Result 308 states and 344 transitions. [2021-12-18 21:19:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 21:19:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-18 21:19:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:01,763 INFO L225 Difference]: With dead ends: 308 [2021-12-18 21:19:01,763 INFO L226 Difference]: Without dead ends: 308 [2021-12-18 21:19:01,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:19:01,764 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 95 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:01,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1194 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 293 Invalid, 0 Unknown, 595 Unchecked, 0.3s Time] [2021-12-18 21:19:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-18 21:19:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 269. [2021-12-18 21:19:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 187 states have (on average 1.5401069518716577) internal successors, (288), 249 states have internal predecessors, (288), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 312 transitions. [2021-12-18 21:19:01,770 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 312 transitions. Word has length 42 [2021-12-18 21:19:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:01,770 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 312 transitions. [2021-12-18 21:19:01,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 312 transitions. [2021-12-18 21:19:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 21:19:01,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:01,770 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] [2021-12-18 21:19:01,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:01,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:01,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953136, now seen corresponding path program 1 times [2021-12-18 21:19:01,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:01,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696222724] [2021-12-18 21:19:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:01,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:01,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:01,982 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) [2021-12-18 21:19:02,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 21:19:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 21:19:02,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:02,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:02,317 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 21:19:02,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 21:19:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:02,669 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:02,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:02,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:02,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696222724] [2021-12-18 21:19:02,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696222724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:02,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:02,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 21:19:02,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537281684] [2021-12-18 21:19:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:02,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:19:02,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:19:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:19:02,826 INFO L87 Difference]: Start difference. First operand 269 states and 312 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:03,678 INFO L93 Difference]: Finished difference Result 277 states and 318 transitions. [2021-12-18 21:19:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:19:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-18 21:19:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:03,679 INFO L225 Difference]: With dead ends: 277 [2021-12-18 21:19:03,679 INFO L226 Difference]: Without dead ends: 277 [2021-12-18 21:19:03,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:19:03,680 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 288 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:03,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 723 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 660 Invalid, 0 Unknown, 264 Unchecked, 0.7s Time] [2021-12-18 21:19:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-18 21:19:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 267. [2021-12-18 21:19:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 187 states have (on average 1.518716577540107) internal successors, (284), 247 states have internal predecessors, (284), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 308 transitions. [2021-12-18 21:19:03,684 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 308 transitions. Word has length 42 [2021-12-18 21:19:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:03,685 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 308 transitions. [2021-12-18 21:19:03,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 308 transitions. [2021-12-18 21:19:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 21:19:03,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:03,686 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] [2021-12-18 21:19:03,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:03,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:03,892 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1930984993, now seen corresponding path program 1 times [2021-12-18 21:19:03,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:03,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355200723] [2021-12-18 21:19:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:03,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:03,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:03,894 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) [2021-12-18 21:19:03,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 21:19:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:19:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:04,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:04,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355200723] [2021-12-18 21:19:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355200723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:04,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:04,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:19:04,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925635270] [2021-12-18 21:19:04,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:04,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:19:04,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:04,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:19:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:19:04,077 INFO L87 Difference]: Start difference. First operand 267 states and 308 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:04,092 INFO L93 Difference]: Finished difference Result 289 states and 329 transitions. [2021-12-18 21:19:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:19:04,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-12-18 21:19:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:04,094 INFO L225 Difference]: With dead ends: 289 [2021-12-18 21:19:04,094 INFO L226 Difference]: Without dead ends: 289 [2021-12-18 21:19:04,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:19:04,094 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 48 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:04,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 555 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:19:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-18 21:19:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2021-12-18 21:19:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 189 states have (on average 1.507936507936508) internal successors, (285), 249 states have internal predecessors, (285), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 309 transitions. [2021-12-18 21:19:04,099 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 309 transitions. Word has length 43 [2021-12-18 21:19:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:04,100 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 309 transitions. [2021-12-18 21:19:04,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 309 transitions. [2021-12-18 21:19:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:19:04,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:04,100 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] [2021-12-18 21:19:04,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:04,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:04,308 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting free_reportsErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -269786093, now seen corresponding path program 1 times [2021-12-18 21:19:04,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:04,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599891169] [2021-12-18 21:19:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:04,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:04,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:04,314 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) [2021-12-18 21:19:04,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 21:19:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 21:19:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:04,540 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 [2021-12-18 21:19:04,660 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 11 treesize of output 7 [2021-12-18 21:19:04,710 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 21:19:04,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-18 21:19:04,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:19:04,847 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 21:19:04,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-12-18 21:19:04,971 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 21:19:04,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 37 [2021-12-18 21:19:05,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 53 [2021-12-18 21:19:05,500 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 21:19:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 31 [2021-12-18 21:19:05,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 21:19:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:06,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:06,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599891169] [2021-12-18 21:19:06,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599891169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:06,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:06,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-18 21:19:06,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826821667] [2021-12-18 21:19:06,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:06,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:19:06,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:19:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:19:06,007 INFO L87 Difference]: Start difference. First operand 269 states and 309 transitions. Second operand has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:06,669 INFO L93 Difference]: Finished difference Result 279 states and 316 transitions. [2021-12-18 21:19:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:19:06,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-18 21:19:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:06,672 INFO L225 Difference]: With dead ends: 279 [2021-12-18 21:19:06,672 INFO L226 Difference]: Without dead ends: 279 [2021-12-18 21:19:06,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:19:06,672 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 62 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:06,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1599 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 615 Invalid, 0 Unknown, 392 Unchecked, 0.6s Time] [2021-12-18 21:19:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-18 21:19:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 269. [2021-12-18 21:19:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 189 states have (on average 1.5026455026455026) internal successors, (284), 249 states have internal predecessors, (284), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2021-12-18 21:19:06,677 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 45 [2021-12-18 21:19:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:06,677 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2021-12-18 21:19:06,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2021-12-18 21:19:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:19:06,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:06,678 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] [2021-12-18 21:19:06,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-18 21:19:06,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:06,887 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting free_reportsErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:06,887 INFO L85 PathProgramCache]: Analyzing trace with hash -269786092, now seen corresponding path program 1 times [2021-12-18 21:19:06,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:06,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444222138] [2021-12-18 21:19:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:06,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:06,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:06,888 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:06,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 21:19:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 21:19:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:07,167 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 [2021-12-18 21:19:07,252 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:19:07,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 21:19:07,557 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 11 treesize of output 7 [2021-12-18 21:19:07,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:07,663 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-12-18 21:19:07,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 70 [2021-12-18 21:19:07,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 21:19:07,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-12-18 21:19:07,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-18 21:19:08,217 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 21:19:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-18 21:19:08,252 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-18 21:19:08,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 40 [2021-12-18 21:19:10,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-12-18 21:19:10,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:10,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:10,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-12-18 21:19:14,440 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 15 treesize of output 7 [2021-12-18 21:19:14,447 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 49 treesize of output 25 [2021-12-18 21:19:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:14,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:14,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444222138] [2021-12-18 21:19:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444222138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:14,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:14,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-18 21:19:14,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864571193] [2021-12-18 21:19:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:19:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:19:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=404, Unknown=1, NotChecked=0, Total=462 [2021-12-18 21:19:14,874 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:15,591 INFO L93 Difference]: Finished difference Result 270 states and 308 transitions. [2021-12-18 21:19:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:19:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-18 21:19:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:15,593 INFO L225 Difference]: With dead ends: 270 [2021-12-18 21:19:15,593 INFO L226 Difference]: Without dead ends: 270 [2021-12-18 21:19:15,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=93, Invalid=662, Unknown=1, NotChecked=0, Total=756 [2021-12-18 21:19:15,594 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 12 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:15,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1770 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 315 Invalid, 0 Unknown, 850 Unchecked, 0.4s Time] [2021-12-18 21:19:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-18 21:19:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-12-18 21:19:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 189 states have (on average 1.4973544973544974) internal successors, (283), 249 states have internal predecessors, (283), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 307 transitions. [2021-12-18 21:19:15,598 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 307 transitions. Word has length 45 [2021-12-18 21:19:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 307 transitions. [2021-12-18 21:19:15,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 307 transitions. [2021-12-18 21:19:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:19:15,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:15,599 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] [2021-12-18 21:19:15,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:15,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:15,808 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1036278110, now seen corresponding path program 1 times [2021-12-18 21:19:15,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627522054] [2021-12-18 21:19:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:15,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:15,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:15,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:15,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:19:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 21:19:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:16,190 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:19:16,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 51 [2021-12-18 21:19:16,462 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 21:19:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 42 [2021-12-18 21:19:16,654 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-12-18 21:19:16,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 44 treesize of output 81 [2021-12-18 21:19:16,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:17,349 INFO L354 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2021-12-18 21:19:17,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2021-12-18 21:19:17,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:17,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:17,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:18,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:19:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:19,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:19,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:19,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627522054] [2021-12-18 21:19:19,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627522054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:19,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:19,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-18 21:19:19,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655879733] [2021-12-18 21:19:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:19,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:19:19,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:19:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:19:19,311 INFO L87 Difference]: Start difference. First operand 269 states and 307 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:19,632 INFO L93 Difference]: Finished difference Result 280 states and 320 transitions. [2021-12-18 21:19:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:19:19,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-18 21:19:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:19,634 INFO L225 Difference]: With dead ends: 280 [2021-12-18 21:19:19,634 INFO L226 Difference]: Without dead ends: 280 [2021-12-18 21:19:19,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:19:19,635 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 66 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1033 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:19,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1493 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 1033 Unchecked, 0.2s Time] [2021-12-18 21:19:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-18 21:19:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 273. [2021-12-18 21:19:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 193 states have (on average 1.4922279792746114) internal successors, (288), 253 states have internal predecessors, (288), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 312 transitions. [2021-12-18 21:19:19,640 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 312 transitions. Word has length 45 [2021-12-18 21:19:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:19,640 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 312 transitions. [2021-12-18 21:19:19,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 312 transitions. [2021-12-18 21:19:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 21:19:19,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:19,641 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] [2021-12-18 21:19:19,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-18 21:19:19,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:19,850 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1036278109, now seen corresponding path program 1 times [2021-12-18 21:19:19,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:19,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293105706] [2021-12-18 21:19:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:19,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:19,852 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:19,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 21:19:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:20,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 21:19:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:20,309 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 21:19:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 21:19:20,529 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:19:20,529 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:19:20,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:20,684 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:20,685 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 [2021-12-18 21:19:20,739 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:20,739 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 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:20,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:20,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:21,249 INFO L354 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2021-12-18 21:19:21,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2021-12-18 21:19:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-18 21:19:21,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:22,113 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 15 treesize of output 7 [2021-12-18 21:19:22,124 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 15 treesize of output 7 [2021-12-18 21:19:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:22,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:22,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:22,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293105706] [2021-12-18 21:19:22,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293105706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:22,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:22,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-18 21:19:22,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778193608] [2021-12-18 21:19:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:22,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:19:22,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:19:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:19:22,217 INFO L87 Difference]: Start difference. First operand 273 states and 312 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:23,412 INFO L93 Difference]: Finished difference Result 434 states and 501 transitions. [2021-12-18 21:19:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:19:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-18 21:19:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:23,414 INFO L225 Difference]: With dead ends: 434 [2021-12-18 21:19:23,414 INFO L226 Difference]: Without dead ends: 434 [2021-12-18 21:19:23,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:19:23,415 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 258 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1104 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:23,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1804 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 937 Invalid, 0 Unknown, 1104 Unchecked, 1.0s Time] [2021-12-18 21:19:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-18 21:19:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 273. [2021-12-18 21:19:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 193 states have (on average 1.4870466321243523) internal successors, (287), 253 states have internal predecessors, (287), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-18 21:19:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 311 transitions. [2021-12-18 21:19:23,421 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 311 transitions. Word has length 45 [2021-12-18 21:19:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:23,421 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 311 transitions. [2021-12-18 21:19:23,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 311 transitions. [2021-12-18 21:19:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:19:23,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:23,422 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] [2021-12-18 21:19:23,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:23,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:23,633 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting free_reportsErr2REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1566398444, now seen corresponding path program 1 times [2021-12-18 21:19:23,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:23,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628306670] [2021-12-18 21:19:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:23,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:23,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:23,635 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:23,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 21:19:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:23,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 21:19:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:23,975 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:19:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 41 [2021-12-18 21:19:24,198 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 11 treesize of output 7 [2021-12-18 21:19:24,251 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:19:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:19:24,443 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 11 treesize of output 7 [2021-12-18 21:19:24,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 21:19:24,543 INFO L354 Elim1Store]: treesize reduction 38, result has 55.8 percent of original size [2021-12-18 21:19:24,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 76 [2021-12-18 21:19:24,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 21:19:24,802 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-18 21:19:24,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2021-12-18 21:19:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:24,938 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:24,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-12-18 21:19:25,014 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-12-18 21:19:25,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:25,229 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 15 treesize of output 7 [2021-12-18 21:19:25,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:25,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 21 [2021-12-18 21:19:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:25,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:25,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:25,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628306670] [2021-12-18 21:19:25,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628306670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:25,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:25,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-12-18 21:19:25,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695716229] [2021-12-18 21:19:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 21:19:25,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 21:19:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:19:25,421 INFO L87 Difference]: Start difference. First operand 273 states and 311 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:27,239 INFO L93 Difference]: Finished difference Result 308 states and 343 transitions. [2021-12-18 21:19:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 21:19:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-12-18 21:19:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:27,243 INFO L225 Difference]: With dead ends: 308 [2021-12-18 21:19:27,243 INFO L226 Difference]: Without dead ends: 308 [2021-12-18 21:19:27,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 21:19:27,243 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 166 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:27,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1667 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1037 Invalid, 0 Unknown, 271 Unchecked, 1.1s Time] [2021-12-18 21:19:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-18 21:19:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 286. [2021-12-18 21:19:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 204 states have (on average 1.5049019607843137) internal successors, (307), 264 states have internal predecessors, (307), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-18 21:19:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 333 transitions. [2021-12-18 21:19:27,249 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 333 transitions. Word has length 47 [2021-12-18 21:19:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:27,249 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 333 transitions. [2021-12-18 21:19:27,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 333 transitions. [2021-12-18 21:19:27,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:19:27,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:27,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:27,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:27,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:27,459 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting free_reportsErr3REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1566398443, now seen corresponding path program 1 times [2021-12-18 21:19:27,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943940077] [2021-12-18 21:19:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:27,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:27,461 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:27,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 21:19:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 21:19:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:27,745 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 [2021-12-18 21:19:27,806 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:19:27,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:19:27,992 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 11 treesize of output 7 [2021-12-18 21:19:27,998 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 11 treesize of output 7 [2021-12-18 21:19:28,050 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:19:28,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:19:28,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:19:28,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 21:19:28,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:19:28,329 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 21:19:28,329 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 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-18 21:19:28,362 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-18 21:19:28,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 37 [2021-12-18 21:19:28,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-12-18 21:19:28,429 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-18 21:19:28,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 20 [2021-12-18 21:19:28,656 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-12-18 21:19:28,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-12-18 21:19:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-18 21:19:28,925 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 62 [2021-12-18 21:19:28,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:19:29,187 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:29,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 62 [2021-12-18 21:19:29,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:19:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 21:19:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:19:30,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:30,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 53 [2021-12-18 21:19:30,119 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:19:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 21:19:30,126 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:30,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:30,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:30,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943940077] [2021-12-18 21:19:30,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943940077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:30,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:30,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-12-18 21:19:30,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611533555] [2021-12-18 21:19:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:30,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 21:19:30,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 21:19:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-12-18 21:19:30,214 INFO L87 Difference]: Start difference. First operand 286 states and 333 transitions. Second operand has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:31,182 INFO L93 Difference]: Finished difference Result 285 states and 327 transitions. [2021-12-18 21:19:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 21:19:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-12-18 21:19:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:31,183 INFO L225 Difference]: With dead ends: 285 [2021-12-18 21:19:31,183 INFO L226 Difference]: Without dead ends: 285 [2021-12-18 21:19:31,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-12-18 21:19:31,184 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 11 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1012 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:31,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1690 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 512 Invalid, 0 Unknown, 1012 Unchecked, 0.7s Time] [2021-12-18 21:19:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-18 21:19:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2021-12-18 21:19:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 202 states have (on average 1.495049504950495) internal successors, (302), 262 states have internal predecessors, (302), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 327 transitions. [2021-12-18 21:19:31,188 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 327 transitions. Word has length 47 [2021-12-18 21:19:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:31,188 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 327 transitions. [2021-12-18 21:19:31,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 327 transitions. [2021-12-18 21:19:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:19:31,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:31,189 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] [2021-12-18 21:19:31,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:31,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:31,398 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 463879875, now seen corresponding path program 1 times [2021-12-18 21:19:31,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:31,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104493357] [2021-12-18 21:19:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:31,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:31,400 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:31,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 21:19:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-18 21:19:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:32,103 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:19:32,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-12-18 21:19:32,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:32,386 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-12-18 21:19:32,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 47 [2021-12-18 21:19:32,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,470 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 21:19:32,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2021-12-18 21:19:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,711 INFO L354 Elim1Store]: treesize reduction 100, result has 36.3 percent of original size [2021-12-18 21:19:32,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 48 treesize of output 89 [2021-12-18 21:19:33,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:33,082 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 21:19:33,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-12-18 21:19:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,845 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:33,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 61 [2021-12-18 21:19:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:33,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-18 21:19:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:34,528 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:34,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:19:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:34,691 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:34,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:19:34,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:34,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:35,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:19:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:35,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:35,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:19:35,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:19:37,856 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-12-18 21:19:37,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-12-18 21:19:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:39,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:39,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:39,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104493357] [2021-12-18 21:19:39,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104493357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:39,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:39,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-18 21:19:39,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411105675] [2021-12-18 21:19:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:39,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 21:19:39,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 21:19:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:19:39,739 INFO L87 Difference]: Start difference. First operand 284 states and 327 transitions. Second operand has 24 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:40,461 INFO L93 Difference]: Finished difference Result 308 states and 357 transitions. [2021-12-18 21:19:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 21:19:40,461 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2021-12-18 21:19:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:40,462 INFO L225 Difference]: With dead ends: 308 [2021-12-18 21:19:40,462 INFO L226 Difference]: Without dead ends: 308 [2021-12-18 21:19:40,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-12-18 21:19:40,463 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 85 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1205 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:40,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1797 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 381 Invalid, 0 Unknown, 1205 Unchecked, 0.4s Time] [2021-12-18 21:19:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-18 21:19:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 287. [2021-12-18 21:19:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 205 states have (on average 1.497560975609756) internal successors, (307), 265 states have internal predecessors, (307), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 332 transitions. [2021-12-18 21:19:40,467 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 332 transitions. Word has length 48 [2021-12-18 21:19:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:40,467 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 332 transitions. [2021-12-18 21:19:40,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 332 transitions. [2021-12-18 21:19:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:19:40,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:40,468 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] [2021-12-18 21:19:40,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:40,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:40,678 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash 463879876, now seen corresponding path program 1 times [2021-12-18 21:19:40,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:40,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146704771] [2021-12-18 21:19:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:40,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:40,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:40,680 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:40,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 21:19:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-18 21:19:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:41,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:41,275 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:19:41,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 21:19:41,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:41,640 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 11 treesize of output 7 [2021-12-18 21:19:41,731 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-12-18 21:19:41,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 70 [2021-12-18 21:19:41,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 21:19:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:41,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-18 21:19:41,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-18 21:19:42,204 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 21:19:42,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-18 21:19:42,234 INFO L354 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2021-12-18 21:19:42,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 44 treesize of output 50 [2021-12-18 21:19:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 21:19:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 43 [2021-12-18 21:19:43,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-12-18 21:19:43,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 105 [2021-12-18 21:19:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:43,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 82 [2021-12-18 21:19:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-18 21:19:43,643 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:43,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 83 [2021-12-18 21:19:43,661 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:43,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 81 [2021-12-18 21:19:43,824 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:43,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 83 [2021-12-18 21:19:43,839 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:43,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 81 [2021-12-18 21:19:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-18 21:19:44,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-18 21:19:44,099 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 83 [2021-12-18 21:19:44,131 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 81 [2021-12-18 21:19:44,373 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:44,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 83 [2021-12-18 21:19:44,392 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:19:44,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 81 [2021-12-18 21:19:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-18 21:19:46,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-12-18 21:19:47,406 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-12-18 21:19:47,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 48 [2021-12-18 21:19:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-18 21:19:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:47,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:47,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146704771] [2021-12-18 21:19:47,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146704771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:47,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:47,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-12-18 21:19:47,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122855853] [2021-12-18 21:19:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:47,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 21:19:47,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 21:19:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-12-18 21:19:47,661 INFO L87 Difference]: Start difference. First operand 287 states and 332 transitions. Second operand has 29 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:48,570 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2021-12-18 21:19:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 21:19:48,570 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2021-12-18 21:19:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:48,571 INFO L225 Difference]: With dead ends: 312 [2021-12-18 21:19:48,571 INFO L226 Difference]: Without dead ends: 312 [2021-12-18 21:19:48,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 21:19:48,572 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 19 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1152 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:48,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2010 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 316 Invalid, 0 Unknown, 1152 Unchecked, 0.4s Time] [2021-12-18 21:19:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-18 21:19:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2021-12-18 21:19:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 226 states have (on average 1.4646017699115044) internal successors, (331), 286 states have internal predecessors, (331), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 356 transitions. [2021-12-18 21:19:48,576 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 356 transitions. Word has length 48 [2021-12-18 21:19:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:48,577 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 356 transitions. [2021-12-18 21:19:48,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 356 transitions. [2021-12-18 21:19:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:19:48,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:48,577 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] [2021-12-18 21:19:48,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-18 21:19:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:48,788 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 245025158, now seen corresponding path program 1 times [2021-12-18 21:19:48,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272247460] [2021-12-18 21:19:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:48,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:48,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:48,790 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:48,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 21:19:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-18 21:19:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:49,538 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:19:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 21:19:49,853 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 11 treesize of output 7 [2021-12-18 21:19:49,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:19:49,936 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 21:19:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-18 21:19:49,978 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-12-18 21:19:49,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 71 [2021-12-18 21:19:50,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-18 21:19:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-12-18 21:19:50,402 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 21:19:50,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-18 21:19:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:50,462 INFO L354 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2021-12-18 21:19:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 45 treesize of output 51 [2021-12-18 21:19:50,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2021-12-18 21:19:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:50,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 21:19:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,115 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:19:51,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 78 [2021-12-18 21:19:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2021-12-18 21:19:51,417 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 21:19:51,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-18 21:19:51,447 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:51,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2021-12-18 21:19:51,585 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:51,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2021-12-18 21:19:51,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,624 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:19:51,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-18 21:19:51,780 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:51,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2021-12-18 21:19:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,814 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:19:51,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-18 21:19:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:51,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-12-18 21:19:51,968 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:19:51,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2021-12-18 21:19:55,169 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-18 21:19:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 52 [2021-12-18 21:19:55,193 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:19:55,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-18 21:19:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:55,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:55,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272247460] [2021-12-18 21:19:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272247460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:55,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:55,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-12-18 21:19:55,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263095116] [2021-12-18 21:19:55,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:55,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 21:19:55,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 21:19:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:19:55,456 INFO L87 Difference]: Start difference. First operand 308 states and 356 transitions. Second operand has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:56,165 INFO L93 Difference]: Finished difference Result 335 states and 386 transitions. [2021-12-18 21:19:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 21:19:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2021-12-18 21:19:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:56,166 INFO L225 Difference]: With dead ends: 335 [2021-12-18 21:19:56,166 INFO L226 Difference]: Without dead ends: 335 [2021-12-18 21:19:56,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 21:19:56,167 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 92 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:56,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1880 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 1242 Unchecked, 0.3s Time] [2021-12-18 21:19:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-18 21:19:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 287. [2021-12-18 21:19:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 205 states have (on average 1.4926829268292683) internal successors, (306), 265 states have internal predecessors, (306), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 331 transitions. [2021-12-18 21:19:56,171 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 331 transitions. Word has length 48 [2021-12-18 21:19:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:56,172 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 331 transitions. [2021-12-18 21:19:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:19:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 331 transitions. [2021-12-18 21:19:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 21:19:56,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:56,172 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] [2021-12-18 21:19:56,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-18 21:19:56,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:56,383 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2098722122, now seen corresponding path program 1 times [2021-12-18 21:19:56,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:56,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252718619] [2021-12-18 21:19:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:56,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:56,384 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:56,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 21:19:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:56,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:19:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:56,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:56,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:56,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252718619] [2021-12-18 21:19:56,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252718619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:56,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:56,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:19:56,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317700277] [2021-12-18 21:19:56,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:56,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:19:56,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:19:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:19:56,634 INFO L87 Difference]: Start difference. First operand 287 states and 331 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:56,650 INFO L93 Difference]: Finished difference Result 304 states and 346 transitions. [2021-12-18 21:19:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:19:56,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-12-18 21:19:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:56,651 INFO L225 Difference]: With dead ends: 304 [2021-12-18 21:19:56,651 INFO L226 Difference]: Without dead ends: 304 [2021-12-18 21:19:56,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:19:56,652 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 75 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:56,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 553 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:19:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-18 21:19:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 285. [2021-12-18 21:19:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 203 states have (on average 1.4827586206896552) internal successors, (301), 263 states have internal predecessors, (301), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 326 transitions. [2021-12-18 21:19:56,657 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 326 transitions. Word has length 49 [2021-12-18 21:19:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:56,657 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 326 transitions. [2021-12-18 21:19:56,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 326 transitions. [2021-12-18 21:19:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 21:19:56,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:56,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:56,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-18 21:19:56,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:56,868 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash -888034331, now seen corresponding path program 1 times [2021-12-18 21:19:56,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:56,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985556306] [2021-12-18 21:19:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:56,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:56,870 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:56,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-18 21:19:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:19:57,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:57,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:57,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:57,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985556306] [2021-12-18 21:19:57,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985556306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:57,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:57,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:19:57,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213193754] [2021-12-18 21:19:57,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:57,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:19:57,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:19:57,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:19:57,173 INFO L87 Difference]: Start difference. First operand 285 states and 326 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:57,754 INFO L93 Difference]: Finished difference Result 385 states and 439 transitions. [2021-12-18 21:19:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:19:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-18 21:19:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:57,756 INFO L225 Difference]: With dead ends: 385 [2021-12-18 21:19:57,756 INFO L226 Difference]: Without dead ends: 385 [2021-12-18 21:19:57,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:19:57,756 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 80 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:57,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 362 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 21:19:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-18 21:19:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 284. [2021-12-18 21:19:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 203 states have (on average 1.4729064039408868) internal successors, (299), 262 states have internal predecessors, (299), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 324 transitions. [2021-12-18 21:19:57,761 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 324 transitions. Word has length 50 [2021-12-18 21:19:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 324 transitions. [2021-12-18 21:19:57,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 324 transitions. [2021-12-18 21:19:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 21:19:57,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:57,762 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] [2021-12-18 21:19:57,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:57,972 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -888034332, now seen corresponding path program 1 times [2021-12-18 21:19:57,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:57,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868008837] [2021-12-18 21:19:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:57,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:57,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:57,974 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:57,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 21:19:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:58,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 21:19:58,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:58,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:58,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:58,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868008837] [2021-12-18 21:19:58,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868008837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:58,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:58,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:19:58,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199875999] [2021-12-18 21:19:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:58,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:19:58,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:19:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:19:58,215 INFO L87 Difference]: Start difference. First operand 284 states and 324 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:58,382 INFO L93 Difference]: Finished difference Result 344 states and 394 transitions. [2021-12-18 21:19:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:19:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-18 21:19:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:58,384 INFO L225 Difference]: With dead ends: 344 [2021-12-18 21:19:58,384 INFO L226 Difference]: Without dead ends: 344 [2021-12-18 21:19:58,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:19:58,384 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 44 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:58,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 322 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:19:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-18 21:19:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 283. [2021-12-18 21:19:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 203 states have (on average 1.4630541871921183) internal successors, (297), 261 states have internal predecessors, (297), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:19:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 322 transitions. [2021-12-18 21:19:58,388 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 322 transitions. Word has length 50 [2021-12-18 21:19:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:58,388 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 322 transitions. [2021-12-18 21:19:58,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 322 transitions. [2021-12-18 21:19:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:19:58,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:58,389 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] [2021-12-18 21:19:58,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:58,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:58,599 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2119273512, now seen corresponding path program 1 times [2021-12-18 21:19:58,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999452874] [2021-12-18 21:19:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:58,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:58,601 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:58,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-18 21:19:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:19:58,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:19:58,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:19:58,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999452874] [2021-12-18 21:19:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999452874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:19:58,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:19:58,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:19:58,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889172466] [2021-12-18 21:19:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:19:58,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:19:58,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:58,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:19:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:19:58,838 INFO L87 Difference]: Start difference. First operand 283 states and 322 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:59,174 INFO L93 Difference]: Finished difference Result 303 states and 340 transitions. [2021-12-18 21:19:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:19:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2021-12-18 21:19:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:59,176 INFO L225 Difference]: With dead ends: 303 [2021-12-18 21:19:59,176 INFO L226 Difference]: Without dead ends: 303 [2021-12-18 21:19:59,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:19:59,177 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 44 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:59,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 505 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:19:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-18 21:19:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2021-12-18 21:19:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 214 states have (on average 1.4626168224299065) internal successors, (313), 271 states have internal predecessors, (313), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-18 21:19:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 340 transitions. [2021-12-18 21:19:59,182 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 340 transitions. Word has length 52 [2021-12-18 21:19:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:59,183 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 340 transitions. [2021-12-18 21:19:59,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:19:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 340 transitions. [2021-12-18 21:19:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:19:59,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:59,184 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] [2021-12-18 21:19:59,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:59,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:59,396 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:19:59,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:59,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2119273511, now seen corresponding path program 1 times [2021-12-18 21:19:59,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:59,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335199277] [2021-12-18 21:19:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:19:59,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:59,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:59,412 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:59,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 21:19:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:19:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 21:19:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:59,852 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:19:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:20:00,027 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 11 treesize of output 7 [2021-12-18 21:20:00,038 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 11 treesize of output 7 [2021-12-18 21:20:00,096 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:20:00,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:20:00,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:00,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:20:00,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 21:20:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:20:00,353 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-18 21:20:00,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 37 [2021-12-18 21:20:00,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 21:20:00,620 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-18 21:20:00,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2021-12-18 21:20:00,765 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:20:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2021-12-18 21:20:00,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:20:00,883 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 21:20:00,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2021-12-18 21:20:00,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 21:20:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:01,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:20:01,277 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:20:01,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-12-18 21:20:01,282 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-12-18 21:20:01,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2021-12-18 21:20:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:01,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:01,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335199277] [2021-12-18 21:20:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335199277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:01,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:01,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-12-18 21:20:01,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053484184] [2021-12-18 21:20:01,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:01,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 21:20:01,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 21:20:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-12-18 21:20:01,383 INFO L87 Difference]: Start difference. First operand 295 states and 340 transitions. Second operand has 28 states, 25 states have (on average 1.76) internal successors, (44), 21 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:20:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:03,964 INFO L93 Difference]: Finished difference Result 329 states and 362 transitions. [2021-12-18 21:20:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 21:20:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.76) internal successors, (44), 21 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-12-18 21:20:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:03,966 INFO L225 Difference]: With dead ends: 329 [2021-12-18 21:20:03,966 INFO L226 Difference]: Without dead ends: 329 [2021-12-18 21:20:03,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=231, Invalid=1839, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 21:20:03,967 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 369 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:03,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1812 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1529 Invalid, 0 Unknown, 306 Unchecked, 1.6s Time] [2021-12-18 21:20:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-18 21:20:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 284. [2021-12-18 21:20:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 205 states have (on average 1.448780487804878) internal successors, (297), 262 states have internal predecessors, (297), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 322 transitions. [2021-12-18 21:20:03,972 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 322 transitions. Word has length 52 [2021-12-18 21:20:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:03,972 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 322 transitions. [2021-12-18 21:20:03,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.76) internal successors, (44), 21 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:20:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 322 transitions. [2021-12-18 21:20:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 21:20:03,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:03,973 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] [2021-12-18 21:20:03,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:04,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:04,184 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1760156012, now seen corresponding path program 1 times [2021-12-18 21:20:04,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303013852] [2021-12-18 21:20:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:04,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:04,185 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:04,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-18 21:20:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:04,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:20:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:04,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:04,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:04,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303013852] [2021-12-18 21:20:04,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303013852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:04,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:04,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:20:04,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117477711] [2021-12-18 21:20:04,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:04,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:20:04,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:20:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:20:04,453 INFO L87 Difference]: Start difference. First operand 284 states and 322 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:20:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:04,483 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2021-12-18 21:20:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:20:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-18 21:20:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:04,484 INFO L225 Difference]: With dead ends: 360 [2021-12-18 21:20:04,484 INFO L226 Difference]: Without dead ends: 360 [2021-12-18 21:20:04,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:20:04,485 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 93 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:04,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 820 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:20:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-18 21:20:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 290. [2021-12-18 21:20:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 211 states have (on average 1.4360189573459716) internal successors, (303), 268 states have internal predecessors, (303), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 328 transitions. [2021-12-18 21:20:04,488 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 328 transitions. Word has length 51 [2021-12-18 21:20:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:04,489 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 328 transitions. [2021-12-18 21:20:04,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 21:20:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 328 transitions. [2021-12-18 21:20:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:20:04,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:04,490 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] [2021-12-18 21:20:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:04,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:04,706 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1078714490, now seen corresponding path program 1 times [2021-12-18 21:20:04,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:04,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282461325] [2021-12-18 21:20:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:04,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:04,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:04,707 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:04,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-18 21:20:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 21:20:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:05,030 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 11 treesize of output 7 [2021-12-18 21:20:05,179 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:20:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 21:20:05,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:20:05,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 49 [2021-12-18 21:20:05,352 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 15 treesize of output 7 [2021-12-18 21:20:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:05,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:05,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:05,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282461325] [2021-12-18 21:20:05,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282461325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:05,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:05,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-18 21:20:05,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896565751] [2021-12-18 21:20:05,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:05,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:20:05,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:20:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:20:05,367 INFO L87 Difference]: Start difference. First operand 290 states and 328 transitions. Second operand has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:20:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:06,331 INFO L93 Difference]: Finished difference Result 299 states and 336 transitions. [2021-12-18 21:20:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:20:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2021-12-18 21:20:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:06,332 INFO L225 Difference]: With dead ends: 299 [2021-12-18 21:20:06,332 INFO L226 Difference]: Without dead ends: 299 [2021-12-18 21:20:06,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 21:20:06,333 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 658 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:06,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 1129 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 21:20:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-18 21:20:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 290. [2021-12-18 21:20:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 212 states have (on average 1.429245283018868) internal successors, (303), 268 states have internal predecessors, (303), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 328 transitions. [2021-12-18 21:20:06,337 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 328 transitions. Word has length 54 [2021-12-18 21:20:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:06,337 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 328 transitions. [2021-12-18 21:20:06,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:20:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 328 transitions. [2021-12-18 21:20:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 21:20:06,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:06,337 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] [2021-12-18 21:20:06,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:06,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:06,547 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash 919589466, now seen corresponding path program 1 times [2021-12-18 21:20:06,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:06,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621117925] [2021-12-18 21:20:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:06,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:06,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:06,556 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:06,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-18 21:20:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 21:20:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:06,947 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:20:06,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 21:20:07,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:20:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:07,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 27 [2021-12-18 21:20:07,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 21:20:07,583 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 21:20:07,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 23 [2021-12-18 21:20:07,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-12-18 21:20:07,968 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:20:07,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2021-12-18 21:20:08,420 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:20:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-12-18 21:20:08,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:20:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-12-18 21:20:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:08,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:08,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:08,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621117925] [2021-12-18 21:20:08,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621117925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:08,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:08,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-18 21:20:08,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965070272] [2021-12-18 21:20:08,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:08,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:20:08,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:20:08,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:20:08,807 INFO L87 Difference]: Start difference. First operand 290 states and 328 transitions. Second operand has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:20:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:10,523 INFO L93 Difference]: Finished difference Result 293 states and 331 transitions. [2021-12-18 21:20:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 21:20:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-12-18 21:20:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:10,524 INFO L225 Difference]: With dead ends: 293 [2021-12-18 21:20:10,524 INFO L226 Difference]: Without dead ends: 293 [2021-12-18 21:20:10,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:20:10,525 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 71 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:10,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1586 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 329 Unchecked, 1.0s Time] [2021-12-18 21:20:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-18 21:20:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2021-12-18 21:20:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 213 states have (on average 1.4272300469483568) internal successors, (304), 269 states have internal predecessors, (304), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2021-12-18 21:20:10,528 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 55 [2021-12-18 21:20:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:10,528 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2021-12-18 21:20:10,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:20:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2021-12-18 21:20:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 21:20:10,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:10,529 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] [2021-12-18 21:20:10,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:10,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:10,737 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash -776401890, now seen corresponding path program 1 times [2021-12-18 21:20:10,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:10,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584746216] [2021-12-18 21:20:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:10,739 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-18 21:20:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:20:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:11,170 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 21:20:11,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 21:20:11,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:11,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-12-18 21:20:11,484 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 21:20:11,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 34 [2021-12-18 21:20:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:11,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:11,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584746216] [2021-12-18 21:20:11,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584746216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:11,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:11,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 21:20:11,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029620577] [2021-12-18 21:20:11,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:11,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:20:11,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:20:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:20:11,698 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:20:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:12,236 INFO L93 Difference]: Finished difference Result 306 states and 336 transitions. [2021-12-18 21:20:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:20:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-12-18 21:20:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:12,238 INFO L225 Difference]: With dead ends: 306 [2021-12-18 21:20:12,238 INFO L226 Difference]: Without dead ends: 306 [2021-12-18 21:20:12,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:20:12,238 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 72 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:12,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 943 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 368 Invalid, 0 Unknown, 519 Unchecked, 0.5s Time] [2021-12-18 21:20:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-18 21:20:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 291. [2021-12-18 21:20:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 213 states have (on average 1.4225352112676057) internal successors, (303), 269 states have internal predecessors, (303), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 328 transitions. [2021-12-18 21:20:12,243 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 328 transitions. Word has length 55 [2021-12-18 21:20:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:12,243 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 328 transitions. [2021-12-18 21:20:12,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:20:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 328 transitions. [2021-12-18 21:20:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 21:20:12,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:12,244 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] [2021-12-18 21:20:12,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:12,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:12,457 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash -776401889, now seen corresponding path program 1 times [2021-12-18 21:20:12,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031520580] [2021-12-18 21:20:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:12,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:12,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:12,459 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:12,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 21:20:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:12,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 21:20:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:12,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:20:12,939 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 21:20:12,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 21:20:13,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:13,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:20:13,256 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:20:13,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:20:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:13,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:13,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:13,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031520580] [2021-12-18 21:20:13,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031520580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:13,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:13,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 21:20:13,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636443769] [2021-12-18 21:20:13,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:13,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:20:13,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:20:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:20:13,479 INFO L87 Difference]: Start difference. First operand 291 states and 328 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:20:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:14,465 INFO L93 Difference]: Finished difference Result 292 states and 326 transitions. [2021-12-18 21:20:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:20:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-12-18 21:20:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:14,466 INFO L225 Difference]: With dead ends: 292 [2021-12-18 21:20:14,466 INFO L226 Difference]: Without dead ends: 292 [2021-12-18 21:20:14,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:20:14,467 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 138 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:14,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 832 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 700 Invalid, 0 Unknown, 260 Unchecked, 0.9s Time] [2021-12-18 21:20:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-18 21:20:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2021-12-18 21:20:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 213 states have (on average 1.4131455399061033) internal successors, (301), 268 states have internal predecessors, (301), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 326 transitions. [2021-12-18 21:20:14,471 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 326 transitions. Word has length 55 [2021-12-18 21:20:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:14,472 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 326 transitions. [2021-12-18 21:20:14,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:20:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 326 transitions. [2021-12-18 21:20:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 21:20:14,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:14,473 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] [2021-12-18 21:20:14,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:14,686 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1557497336, now seen corresponding path program 1 times [2021-12-18 21:20:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603654326] [2021-12-18 21:20:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:14,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:14,688 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:14,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-18 21:20:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:20:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:14,999 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 11 [2021-12-18 21:20:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:15,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:15,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:15,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603654326] [2021-12-18 21:20:15,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603654326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:15,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:15,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:20:15,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052157234] [2021-12-18 21:20:15,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:15,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:20:15,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:15,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:20:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:20:15,012 INFO L87 Difference]: Start difference. First operand 290 states and 326 transitions. Second operand has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:20:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:15,438 INFO L93 Difference]: Finished difference Result 298 states and 334 transitions. [2021-12-18 21:20:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:20:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-12-18 21:20:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:15,439 INFO L225 Difference]: With dead ends: 298 [2021-12-18 21:20:15,439 INFO L226 Difference]: Without dead ends: 298 [2021-12-18 21:20:15,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:20:15,440 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 53 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:15,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 653 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:20:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-18 21:20:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2021-12-18 21:20:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 218 states have (on average 1.4174311926605505) internal successors, (309), 272 states have internal predecessors, (309), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 334 transitions. [2021-12-18 21:20:15,444 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 334 transitions. Word has length 56 [2021-12-18 21:20:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:15,444 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 334 transitions. [2021-12-18 21:20:15,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:20:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 334 transitions. [2021-12-18 21:20:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 21:20:15,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:15,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:20:15,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:15,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:15,656 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash 201724655, now seen corresponding path program 1 times [2021-12-18 21:20:15,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:15,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285620438] [2021-12-18 21:20:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:15,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:15,658 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:15,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 21:20:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:20:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:20:16,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:16,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:16,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285620438] [2021-12-18 21:20:16,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285620438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:16,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:16,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:20:16,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136999686] [2021-12-18 21:20:16,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:16,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:20:16,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:20:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:20:16,360 INFO L87 Difference]: Start difference. First operand 295 states and 334 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:20:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:16,375 INFO L93 Difference]: Finished difference Result 336 states and 376 transitions. [2021-12-18 21:20:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:20:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-18 21:20:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:16,377 INFO L225 Difference]: With dead ends: 336 [2021-12-18 21:20:16,377 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 21:20:16,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:20:16,378 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 162 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:16,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 678 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2021-12-18 21:20:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 21:20:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2021-12-18 21:20:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 218 states have (on average 1.408256880733945) internal successors, (307), 271 states have internal predecessors, (307), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 332 transitions. [2021-12-18 21:20:16,382 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 332 transitions. Word has length 56 [2021-12-18 21:20:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:16,383 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 332 transitions. [2021-12-18 21:20:16,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:20:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 332 transitions. [2021-12-18 21:20:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 21:20:16,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:16,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:20:16,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:16,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:16,595 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 477520901, now seen corresponding path program 1 times [2021-12-18 21:20:16,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40593797] [2021-12-18 21:20:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:16,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:16,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:16,597 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:16,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-18 21:20:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:20:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:16,997 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 [2021-12-18 21:20:17,077 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:20:17,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:20:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:17,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:17,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40593797] [2021-12-18 21:20:17,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40593797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:17,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:17,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:20:17,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653923736] [2021-12-18 21:20:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:20:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:20:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:20:17,089 INFO L87 Difference]: Start difference. First operand 294 states and 332 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:20:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:17,374 INFO L93 Difference]: Finished difference Result 355 states and 393 transitions. [2021-12-18 21:20:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:20:17,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-12-18 21:20:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:17,375 INFO L225 Difference]: With dead ends: 355 [2021-12-18 21:20:17,375 INFO L226 Difference]: Without dead ends: 355 [2021-12-18 21:20:17,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:20:17,375 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 101 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:17,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 437 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2021-12-18 21:20:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-18 21:20:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 293. [2021-12-18 21:20:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 218 states have (on average 1.4036697247706422) internal successors, (306), 270 states have internal predecessors, (306), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 331 transitions. [2021-12-18 21:20:17,379 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 331 transitions. Word has length 57 [2021-12-18 21:20:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:17,380 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 331 transitions. [2021-12-18 21:20:17,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:20:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 331 transitions. [2021-12-18 21:20:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 21:20:17,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:17,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:20:17,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:17,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:17,585 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 477520902, now seen corresponding path program 1 times [2021-12-18 21:20:17,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:17,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175247304] [2021-12-18 21:20:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:17,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:17,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:17,587 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:17,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-18 21:20:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:20:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:18,013 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 [2021-12-18 21:20:18,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:18,191 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 17 treesize of output 19 [2021-12-18 21:20:18,208 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:20:18,208 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 13 treesize of output 13 [2021-12-18 21:20:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:20:18,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:20:18,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:18,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175247304] [2021-12-18 21:20:18,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175247304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:20:18,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:18,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:20:18,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735414366] [2021-12-18 21:20:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:20:18,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:20:18,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:20:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:20:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:20:18,299 INFO L87 Difference]: Start difference. First operand 293 states and 331 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:20:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:20:19,672 INFO L93 Difference]: Finished difference Result 409 states and 452 transitions. [2021-12-18 21:20:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:20:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-12-18 21:20:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:20:19,674 INFO L225 Difference]: With dead ends: 409 [2021-12-18 21:20:19,674 INFO L226 Difference]: Without dead ends: 409 [2021-12-18 21:20:19,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:20:19,674 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 164 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:20:19,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 515 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 379 Invalid, 0 Unknown, 152 Unchecked, 1.4s Time] [2021-12-18 21:20:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-18 21:20:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 292. [2021-12-18 21:20:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 218 states have (on average 1.3990825688073394) internal successors, (305), 269 states have internal predecessors, (305), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-18 21:20:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-12-18 21:20:19,678 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 57 [2021-12-18 21:20:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:20:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-12-18 21:20:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:20:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-12-18 21:20:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 21:20:19,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:20:19,679 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] [2021-12-18 21:20:19,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-18 21:20:19,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:20:19,889 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting free_reportsErr0REQUIRES_VIOLATION === [free_reportsErr0REQUIRES_VIOLATION, free_reportsErr1REQUIRES_VIOLATION, free_reportsErr2REQUIRES_VIOLATION, free_reportsErr3REQUIRES_VIOLATION (and 72 more)] === [2021-12-18 21:20:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:20:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1389571934, now seen corresponding path program 1 times [2021-12-18 21:20:19,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:20:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551655863] [2021-12-18 21:20:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:19,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:20:19,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:20:19,891 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:20:19,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-18 21:20:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:20:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 21:20:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:20,404 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:20:20,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-12-18 21:20:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:20:20,694 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-12-18 21:20:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 59 [2021-12-18 21:20:20,799 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 21:20:20,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-12-18 21:20:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:20,989 INFO L354 Elim1Store]: treesize reduction 41, result has 44.6 percent of original size [2021-12-18 21:20:20,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 56 [2021-12-18 21:20:21,257 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:20:21,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-12-18 21:20:21,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-12-18 21:20:21,746 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:20:21,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-12-18 21:20:21,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551655863] [2021-12-18 21:20:21,758 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-18 21:20:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [798421281] [2021-12-18 21:20:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:21,759 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:20:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:20:21,761 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:20:21,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-12-18 21:20:21,964 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41e8de93 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-18 21:20:21,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238255243] [2021-12-18 21:20:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:20:21,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:20:21,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:20:21,984 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:20:21,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 21:20:22,123 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41e8de93 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-18 21:20:22,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:20:22,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-18 21:20:22,124 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-12-18 21:20:22,124 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-18 21:20:22,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr0REQUIRES_VIOLATION (75 of 76 remaining) [2021-12-18 21:20:22,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr1REQUIRES_VIOLATION (74 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr2REQUIRES_VIOLATION (73 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr3REQUIRES_VIOLATION (72 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr4ASSERT_VIOLATIONMEMORY_FREE (71 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr5ASSERT_VIOLATIONMEMORY_FREE (70 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr6ASSERT_VIOLATIONMEMORY_FREE (69 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr7REQUIRES_VIOLATION (68 of 76 remaining) [2021-12-18 21:20:22,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_reportsErr8REQUIRES_VIOLATION (67 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION (66 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION (65 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION (64 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION (63 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATION (62 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATION (61 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATION (60 of 76 remaining) [2021-12-18 21:20:22,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATION (59 of 76 remaining) [2021-12-18 21:20:22,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATION (58 of 76 remaining) [2021-12-18 21:20:22,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATION (57 of 76 remaining) [2021-12-18 21:20:22,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATION (56 of 76 remaining) [2021-12-18 21:20:22,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATION (55 of 76 remaining) [2021-12-18 21:20:22,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATION (54 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATION (53 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATION (52 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATION (51 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATION (50 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATION (49 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATION (48 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATION (47 of 76 remaining) [2021-12-18 21:20:22,133 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (46 of 76 remaining) [2021-12-18 21:20:22,134 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (45 of 76 remaining) [2021-12-18 21:20:22,134 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (44 of 76 remaining) [2021-12-18 21:20:22,134 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (43 of 76 remaining) [2021-12-18 21:20:22,134 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (42 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (41 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (40 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (39 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (38 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (37 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (36 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (35 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (34 of 76 remaining) [2021-12-18 21:20:22,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (33 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (32 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (31 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (30 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (29 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (28 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (27 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (26 of 76 remaining) [2021-12-18 21:20:22,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (25 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (24 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (23 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION (22 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (21 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (20 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (19 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (18 of 76 remaining) [2021-12-18 21:20:22,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (17 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (16 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (15 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (14 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (13 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (12 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (11 of 76 remaining) [2021-12-18 21:20:22,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (10 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (9 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (8 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (7 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION (6 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION (5 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION (4 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE (3 of 76 remaining) [2021-12-18 21:20:22,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE (2 of 76 remaining) [2021-12-18 21:20:22,140 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE (1 of 76 remaining) [2021-12-18 21:20:22,140 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK (0 of 76 remaining) [2021-12-18 21:20:22,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-18 21:20:22,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-18 21:20:22,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2021-12-18 21:20:22,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:20:22,755 INFO L732 BasicCegarLoop]: Path program 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] [2021-12-18 21:20:22,757 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 21:20:22,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:20:22 BoogieIcfgContainer [2021-12-18 21:20:22,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 21:20:22,767 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 21:20:22,767 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 21:20:22,768 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 21:20:22,768 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:18:45" (3/4) ... [2021-12-18 21:20:22,771 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-18 21:20:22,771 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 21:20:22,772 INFO L158 Benchmark]: Toolchain (without parser) took 98626.34ms. Allocated memory was 50.3MB in the beginning and 98.6MB in the end (delta: 48.2MB). Free memory was 25.6MB in the beginning and 66.9MB in the end (delta: -41.3MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2021-12-18 21:20:22,772 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory is still 32.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:20:22,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 655.77ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.3MB in the beginning and 44.7MB in the end (delta: -19.4MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2021-12-18 21:20:22,773 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.81ms. Allocated memory is still 67.1MB. Free memory was 44.7MB in the beginning and 41.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-18 21:20:22,773 INFO L158 Benchmark]: Boogie Preprocessor took 51.26ms. Allocated memory is still 67.1MB. Free memory was 41.6MB in the beginning and 39.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:20:22,773 INFO L158 Benchmark]: RCFGBuilder took 772.59ms. Allocated memory is still 67.1MB. Free memory was 38.8MB in the beginning and 28.3MB in the end (delta: 10.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-12-18 21:20:22,773 INFO L158 Benchmark]: TraceAbstraction took 97057.40ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 27.9MB in the beginning and 66.9MB in the end (delta: -39.0MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2021-12-18 21:20:22,773 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 98.6MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:20:22,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory is still 32.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 655.77ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.3MB in the beginning and 44.7MB in the end (delta: -19.4MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.81ms. Allocated memory is still 67.1MB. Free memory was 44.7MB in the beginning and 41.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.26ms. Allocated memory is still 67.1MB. Free memory was 41.6MB in the beginning and 39.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 772.59ms. Allocated memory is still 67.1MB. Free memory was 38.8MB in the beginning and 28.3MB in the end (delta: 10.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * TraceAbstraction took 97057.40ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 27.9MB in the beginning and 66.9MB in the end (delta: -39.0MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 98.6MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L857] struct hid_device dev; [L865] CALL entry_point() [L859] CALL probe_23(&dev) [L840] int ret = - -3; [L841] CALL, EXPR ldv_malloc(sizeof(struct hid_report_enum)) [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L841] RET, EXPR ldv_malloc(sizeof(struct hid_report_enum)) [L841] struct hid_report_enum *p = (struct hid_report_enum *)ldv_malloc(sizeof(struct hid_report_enum)); [L842] COND FALSE !(p==0) [L844] CALL LDV_INIT_LIST_HEAD(&p->report_list) [L540] list->next = list [L541] list->prev = list [L844] RET LDV_INIT_LIST_HEAD(&p->report_list) [L845] dev->report_enum = p [L846] CALL hid_open_report(dev) [L814] struct hid_parser *parser; [L815] struct hid_item item; [L816] CALL, EXPR ldv_zalloc(sizeof(struct hid_parser)) [L533] EXPR, FCALL calloc(size, 1) [L533] return calloc(size, 1); [L816] RET, EXPR ldv_zalloc(sizeof(struct hid_parser)) [L816] parser = ldv_zalloc(sizeof(struct hid_parser)) [L817] COND FALSE !(!parser) [L820] parser->device = device [L821] CALL, EXPR ldv_positive() [L519] int r = __VERIFIER_nondet_int(); [L520] COND FALSE !(r>0) [L521] return 1; [L821] RET, EXPR ldv_positive() [L821] parser->report_id = ldv_positive() [L822] CALL, EXPR fetch_item(&item) [L778] COND FALSE !(__VERIFIER_nondet_int()) [L781] item->type = 0 [L782] item->a = __VERIFIER_nondet_int() [L783] item->b = __VERIFIER_nondet_int() [L784] item->c = __VERIFIER_nondet_int() [L785] return 0; [L822] RET, EXPR fetch_item(&item) [L822] COND TRUE fetch_item(&item)!=-1 [L823] CALL hid_parser_main(parser, &item) [L802] EXPR parser->device [L802] EXPR parser->report_id [L802] CALL, EXPR hid_register_report(parser->device, parser->report_id) [L788] EXPR device->report_enum [L788] struct hid_report_enum *report_enum = device->report_enum; [L789] struct hid_report *report; [L790] COND FALSE !(id >= 256) [L792] report_enum->report_id_hash[id] [L792] COND TRUE report_enum->report_id_hash[id] [L793] EXPR report_enum->report_id_hash[id] [L793] return report_enum->report_id_hash[id]; [L802] RET, EXPR hid_register_report(parser->device, parser->report_id) [L802] struct hid_report *report = hid_register_report(parser->device, parser->report_id); [L803] return report!=((void *)0); [L823] RET hid_parser_main(parser, &item) [L823] COND TRUE hid_parser_main(parser, &item) [L831] EXPR device->report_enum [L831] CALL free_reports(device->report_enum) [L806] struct hid_report *p; [L807] struct hid_report *n; [L808] (&report_enum->report_list)->next - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 810]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 810]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 810]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 845]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 845]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 820]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 820]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 821]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 821]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 781]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 781]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 783]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 783]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 802]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 802]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 802]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 802]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 792]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 792]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 797]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 797]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 828]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 828]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 828]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 831]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 831]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 832]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 832]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 832]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 851]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 851]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 851]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 836]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 836]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 837]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 837]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 837]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 837]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 837]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 864]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 199 locations, 76 error locations. Started 1 CEGAR loops. OverallTime: 97.0s, OverallIterations: 45, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 25.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5175 SdHoareTripleChecker+Valid, 19.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5094 mSDsluCounter, 41846 SdHoareTripleChecker+Invalid, 16.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11650 IncrementalHoareTripleChecker+Unchecked, 34209 mSDsCounter, 523 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15180 IncrementalHoareTripleChecker+Invalid, 27353 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 523 mSolverCounterUnsat, 7637 mSDtfsCounter, 15180 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1850 GetRequests, 1244 SyntacticMatches, 40 SemanticMatches, 566 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 26.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=29, InterpolantAutomatonStates: 534, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 44 MinimizatonAttempts, 1496 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 51.9s InterpolantComputationTime, 1795 NumberOfCodeBlocks, 1795 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1693 ConstructedInterpolants, 475 QuantifiedInterpolants, 36050 SizeOfPredicates, 459 NumberOfNonLiveVariables, 10331 ConjunctsInSsa, 1224 ConjunctsInUnsatCore, 44 InterpolantComputations, 44 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-18 21:20:22,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN