./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/array-memsafety/bubblesort-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:23,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:23,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:23,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:23,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:23,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:23,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:23,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:23,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:23,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:23,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:23,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:23,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:23,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:23,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:23,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:23,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:23,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:23,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:23,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:23,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:23,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:23,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:23,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:23,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:23,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:23,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:23,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:23,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:23,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:23,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:23,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:23,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:23,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:23,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:23,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:23,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:23,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:23,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:23,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:23,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:23,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:35:23,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:23,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:23,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:23,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:23,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:23,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:23,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:23,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:23,162 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:23,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:23,163 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:23,164 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:23,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:23,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:23,164 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:23,164 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:23,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:23,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:23,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:23,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:23,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:23,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:23,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:35:23,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:35:23,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:23,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-12-18 19:35:23,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:23,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:23,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:23,437 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:23,437 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:23,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-18 19:35:23,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f1f4b5/e95eebba50574511829ebc62f655532b/FLAG03e4d6cf4 [2021-12-18 19:35:23,861 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:23,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-18 19:35:23,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f1f4b5/e95eebba50574511829ebc62f655532b/FLAG03e4d6cf4 [2021-12-18 19:35:24,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f1f4b5/e95eebba50574511829ebc62f655532b [2021-12-18 19:35:24,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:24,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:24,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:24,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:24,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb1b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:24,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:24,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,488 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 19:35:24,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@582d356e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,489 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 19:35:24,490 INFO L158 Benchmark]: Toolchain (without parser) took 234.75ms. Allocated memory is still 100.7MB. Free memory was 72.1MB in the beginning and 76.3MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 19:35:24,490 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory was 45.6MB in the beginning and 45.5MB in the end (delta: 117.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:35:24,491 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.94ms. Allocated memory is still 100.7MB. Free memory was 72.1MB in the beginning and 76.3MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 19:35:24,492 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory was 45.6MB in the beginning and 45.5MB in the end (delta: 117.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.94ms. Allocated memory is still 100.7MB. Free memory was 72.1MB in the beginning and 76.3MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:26,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:26,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:26,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:26,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:26,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:26,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:26,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:26,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:26,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:26,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:26,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:26,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:26,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:26,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:26,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:26,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:26,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:26,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:26,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:26,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:26,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:26,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:26,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:26,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:26,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:26,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:26,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:26,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:26,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:26,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:26,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:26,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:26,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:26,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:26,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:26,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:26,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:26,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:26,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:26,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:26,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 19:35:26,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:26,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:26,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:26,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:26,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:26,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:26,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:26,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:26,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:26,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:26,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:26,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:26,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:26,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:26,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:26,246 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 19:35:26,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:26,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:26,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:26,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:26,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:26,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:26,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:26,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:26,260 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 19:35:26,260 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 19:35:26,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:26,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 19:35:26,261 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-12-18 19:35:26,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:26,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:26,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:26,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:26,590 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:26,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-18 19:35:26,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9361a48/e6caea29983041e6808bfcde9e0c4613/FLAG2b043c301 [2021-12-18 19:35:27,118 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:27,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-12-18 19:35:27,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9361a48/e6caea29983041e6808bfcde9e0c4613/FLAG2b043c301 [2021-12-18 19:35:27,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9361a48/e6caea29983041e6808bfcde9e0c4613 [2021-12-18 19:35:27,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:27,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:27,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:27,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:27,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:27,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1004cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27, skipping insertion in model container [2021-12-18 19:35:27,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:27,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:27,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:27,416 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 19:35:27,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:27,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:27,459 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:35:27,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:27,514 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:35:27,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27 WrapperNode [2021-12-18 19:35:27,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:27,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:27,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:35:27,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:35:27,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,559 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-18 19:35:27,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:27,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:35:27,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:35:27,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:35:27,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:35:27,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:35:27,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:35:27,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:35:27,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (1/1) ... [2021-12-18 19:35:27,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:27,627 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 19:35:27,635 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 19:35:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 19:35:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:35:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:35:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 19:35:27,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:35:27,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:35:27,739 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:35:27,740 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:35:28,069 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:35:28,073 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:35:28,073 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 19:35:28,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:28 BoogieIcfgContainer [2021-12-18 19:35:28,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:35:28,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:35:28,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:35:28,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:35:28,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:35:27" (1/3) ... [2021-12-18 19:35:28,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701537f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:28, skipping insertion in model container [2021-12-18 19:35:28,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:27" (2/3) ... [2021-12-18 19:35:28,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701537f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:28, skipping insertion in model container [2021-12-18 19:35:28,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:28" (3/3) ... [2021-12-18 19:35:28,093 INFO L111 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca-2.i [2021-12-18 19:35:28,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:35:28,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-18 19:35:28,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:35:28,142 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 19:35:28,143 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-18 19:35:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:28,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:28,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:28,161 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-18 19:35:28,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:28,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77824663] [2021-12-18 19:35:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:28,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:28,179 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 19:35:28,184 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 19:35:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:35:28,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:28,354 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 19:35:28,372 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 19:35:28,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:28,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77824663] [2021-12-18 19:35:28,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77824663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:28,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:28,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:28,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86896520] [2021-12-18 19:35:28,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:28,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:28,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:28,410 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:28,521 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-18 19:35:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:28,531 INFO L225 Difference]: With dead ends: 40 [2021-12-18 19:35:28,532 INFO L226 Difference]: Without dead ends: 38 [2021-12-18 19:35:28,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:28,536 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:28,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-18 19:35:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-18 19:35:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-18 19:35:28,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-12-18 19:35:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:28,566 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-18 19:35:28,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-18 19:35:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:28,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:28,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:28,589 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 19:35:28,786 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 19:35:28,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-18 19:35:28,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180331404] [2021-12-18 19:35:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:28,790 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 19:35:28,791 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 19:35:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:35:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:28,875 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 19:35:28,916 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 19:35:28,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:28,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180331404] [2021-12-18 19:35:28,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180331404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:28,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:28,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:28,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192608004] [2021-12-18 19:35:28,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:28,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:28,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:28,922 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,161 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-12-18 19:35:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,163 INFO L225 Difference]: With dead ends: 77 [2021-12-18 19:35:29,163 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 19:35:29,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:29,164 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 145 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 19:35:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2021-12-18 19:35:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-18 19:35:29,169 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2021-12-18 19:35:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,170 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-18 19:35:29,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-18 19:35:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:29,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:29,371 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 19:35:29,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-18 19:35:29,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:29,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535357417] [2021-12-18 19:35:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:29,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:29,374 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 19:35:29,376 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 19:35:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:35:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:29,453 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 8 treesize of output 7 [2021-12-18 19:35:29,517 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 19:35:29,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:29,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:29,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535357417] [2021-12-18 19:35:29,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535357417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:29,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731558790] [2021-12-18 19:35:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:29,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,520 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,555 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-18 19:35:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,557 INFO L225 Difference]: With dead ends: 43 [2021-12-18 19:35:29,557 INFO L226 Difference]: Without dead ends: 43 [2021-12-18 19:35:29,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:29,558 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-18 19:35:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-18 19:35:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-12-18 19:35:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-18 19:35:29,567 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-12-18 19:35:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,567 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-18 19:35:29,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-18 19:35:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:29,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,574 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 19:35:29,774 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 19:35:29,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-12-18 19:35:29,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527468602] [2021-12-18 19:35:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:29,778 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 19:35:29,784 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 19:35:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:29,868 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 19:35:29,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:29,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:29,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527468602] [2021-12-18 19:35:29,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527468602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:29,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476005822] [2021-12-18 19:35:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:29,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,871 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,918 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-12-18 19:35:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:35:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,920 INFO L225 Difference]: With dead ends: 67 [2021-12-18 19:35:29,920 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 19:35:29,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:29,921 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 68 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 19:35:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-12-18 19:35:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-18 19:35:29,926 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 9 [2021-12-18 19:35:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,926 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-18 19:35:29,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-18 19:35:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:29,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,951 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 19:35:30,135 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 19:35:30,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052884, now seen corresponding path program 1 times [2021-12-18 19:35:30,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:30,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420544549] [2021-12-18 19:35:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:30,139 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 19:35:30,141 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 19:35:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:30,185 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 19:35:30,205 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 19:35:30,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:30,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420544549] [2021-12-18 19:35:30,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420544549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:30,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:30,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297510080] [2021-12-18 19:35:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:30,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:30,208 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,318 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-18 19:35:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:35:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,320 INFO L225 Difference]: With dead ends: 37 [2021-12-18 19:35:30,320 INFO L226 Difference]: Without dead ends: 37 [2021-12-18 19:35:30,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:30,320 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-18 19:35:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-18 19:35:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-18 19:35:30,323 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2021-12-18 19:35:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,324 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-18 19:35:30,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-18 19:35:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:30,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:30,530 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 19:35:30,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052885, now seen corresponding path program 1 times [2021-12-18 19:35:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543338003] [2021-12-18 19:35:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:30,533 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 19:35:30,534 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 19:35:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 19:35:30,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:30,602 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 8 treesize of output 7 [2021-12-18 19:35:30,725 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 19:35:30,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:30,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:30,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543338003] [2021-12-18 19:35:30,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543338003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:30,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:30,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433518] [2021-12-18 19:35:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:30,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:30,727 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,745 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-18 19:35:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:35:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,745 INFO L225 Difference]: With dead ends: 41 [2021-12-18 19:35:30,746 INFO L226 Difference]: Without dead ends: 41 [2021-12-18 19:35:30,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:30,746 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2021-12-18 19:35:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-18 19:35:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-18 19:35:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-18 19:35:30,749 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 9 [2021-12-18 19:35:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,750 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-18 19:35:30,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-18 19:35:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:30,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-18 19:35:30,957 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 19:35:30,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-18 19:35:30,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:30,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982980995] [2021-12-18 19:35:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:30,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:30,960 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 19:35:30,961 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 19:35:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:35:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:31,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982980995] [2021-12-18 19:35:31,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982980995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:31,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:31,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 19:35:31,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799203565] [2021-12-18 19:35:31,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:35:31,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:35:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:31,101 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,167 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-12-18 19:35:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:31,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:35:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,170 INFO L225 Difference]: With dead ends: 69 [2021-12-18 19:35:31,170 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 19:35:31,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:31,171 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 81 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:31,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 191 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 19:35:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-12-18 19:35:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-12-18 19:35:31,173 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 10 [2021-12-18 19:35:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,174 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-12-18 19:35:31,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-12-18 19:35:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:31,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,174 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:31,183 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 19:35:31,381 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 19:35:31,381 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-18 19:35:31,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:31,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872053953] [2021-12-18 19:35:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:31,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:31,383 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 19:35:31,384 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 19:35:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 19:35:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:31,477 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 8 treesize of output 7 [2021-12-18 19:35:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:32,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:32,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872053953] [2021-12-18 19:35:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872053953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:32,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:32,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-18 19:35:32,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207462158] [2021-12-18 19:35:32,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:35:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:35:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:32,053 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:32,571 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-12-18 19:35:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:35:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:32,573 INFO L225 Difference]: With dead ends: 73 [2021-12-18 19:35:32,573 INFO L226 Difference]: Without dead ends: 73 [2021-12-18 19:35:32,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:35:32,574 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:32,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 111 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 23 Unchecked, 0.5s Time] [2021-12-18 19:35:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-18 19:35:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-18 19:35:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-18 19:35:32,577 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 10 [2021-12-18 19:35:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:32,577 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-18 19:35:32,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-18 19:35:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:35:32,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:32,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:32,584 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 19:35:32,779 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 19:35:32,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash 363894000, now seen corresponding path program 1 times [2021-12-18 19:35:32,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:32,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962691113] [2021-12-18 19:35:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:32,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:32,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:32,781 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 19:35:32,782 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 19:35:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:32,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:32,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:32,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962691113] [2021-12-18 19:35:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962691113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:32,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935400454] [2021-12-18 19:35:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:32,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:32,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:32,862 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:33,035 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-12-18 19:35:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:35:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:33,036 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:35:33,037 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:35:33,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:33,037 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:33,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 138 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:35:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2021-12-18 19:35:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-12-18 19:35:33,042 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 13 [2021-12-18 19:35:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:33,042 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-12-18 19:35:33,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-12-18 19:35:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:35:33,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:33,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:33,050 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 19:35:33,248 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 19:35:33,248 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2021-12-18 19:35:33,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198427784] [2021-12-18 19:35:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:33,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:33,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:33,253 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 19:35:33,254 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 19:35:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:33,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:35:33,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:33,310 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 8 treesize of output 7 [2021-12-18 19:35:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198427784] [2021-12-18 19:35:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198427784] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:33,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:33,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-12-18 19:35:33,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579508700] [2021-12-18 19:35:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:33,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:33,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:35:33,835 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:34,162 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-18 19:35:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:34,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:35:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:34,164 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:35:34,164 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:35:34,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:34,165 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:34,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 45 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:35:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-12-18 19:35:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-18 19:35:34,168 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 13 [2021-12-18 19:35:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:34,169 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-18 19:35:34,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-18 19:35:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:35:34,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:34,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:34,179 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 19:35:34,375 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 19:35:34,375 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-12-18 19:35:34,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718453782] [2021-12-18 19:35:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:34,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:34,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:34,377 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 19:35:34,378 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 19:35:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:35:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:34,437 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 8 treesize of output 7 [2021-12-18 19:35:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:34,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:34,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:34,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718453782] [2021-12-18 19:35:34,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718453782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:34,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:34,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:35:34,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556874980] [2021-12-18 19:35:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:34,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:35:34,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:35:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:34,623 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:34,866 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-18 19:35:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:35:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:34,868 INFO L225 Difference]: With dead ends: 63 [2021-12-18 19:35:34,868 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 19:35:34,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:34,868 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:34,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-12-18 19:35:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 19:35:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-12-18 19:35:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-18 19:35:34,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 14 [2021-12-18 19:35:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:34,871 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-18 19:35:34,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-18 19:35:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:35:34,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:34,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:34,883 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 19:35:35,082 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 19:35:35,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash 267720213, now seen corresponding path program 1 times [2021-12-18 19:35:35,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530454384] [2021-12-18 19:35:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:35,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:35,084 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 19:35:35,085 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 19:35:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:35:37,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:37,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530454384] [2021-12-18 19:35:37,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530454384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:37,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:37,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:37,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129850620] [2021-12-18 19:35:37,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:37,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:37,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:35:37,234 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:37,243 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-12-18 19:35:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 19:35:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:37,244 INFO L225 Difference]: With dead ends: 61 [2021-12-18 19:35:37,244 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 19:35:37,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:35:37,245 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:37,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-18 19:35:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 19:35:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-12-18 19:35:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-18 19:35:37,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 16 [2021-12-18 19:35:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:37,247 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-18 19:35:37,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-18 19:35:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:35:37,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:37,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:37,255 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 19:35:37,454 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 19:35:37,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -743397037, now seen corresponding path program 1 times [2021-12-18 19:35:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:37,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551461311] [2021-12-18 19:35:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:37,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:37,456 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 19:35:37,457 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 19:35:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:37,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:35:39,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:39,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:39,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551461311] [2021-12-18 19:35:39,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551461311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:39,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:39,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:39,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979158692] [2021-12-18 19:35:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:39,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:39,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:35:39,597 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:39,644 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-12-18 19:35:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:39,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 19:35:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:39,645 INFO L225 Difference]: With dead ends: 64 [2021-12-18 19:35:39,645 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 19:35:39,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:35:39,646 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:39,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-18 19:35:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 19:35:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-12-18 19:35:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-18 19:35:39,648 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 16 [2021-12-18 19:35:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:39,648 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-18 19:35:39,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-18 19:35:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:39,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:39,649 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:39,658 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 19:35:39,855 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 19:35:39,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash -290583109, now seen corresponding path program 1 times [2021-12-18 19:35:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:39,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913420333] [2021-12-18 19:35:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:39,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:39,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:39,857 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 19:35:39,857 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 19:35:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:39,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:39,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:40,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:40,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913420333] [2021-12-18 19:35:40,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913420333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:40,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:40,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 19:35:40,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106395064] [2021-12-18 19:35:40,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:35:40,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:35:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:40,027 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:40,073 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-18 19:35:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:35:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:40,074 INFO L225 Difference]: With dead ends: 60 [2021-12-18 19:35:40,074 INFO L226 Difference]: Without dead ends: 49 [2021-12-18 19:35:40,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:40,075 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:40,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 154 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-18 19:35:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-18 19:35:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-18 19:35:40,077 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 17 [2021-12-18 19:35:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:40,078 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-18 19:35:40,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-18 19:35:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:40,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:40,078 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:40,087 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 19:35:40,279 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 19:35:40,279 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1570446787, now seen corresponding path program 1 times [2021-12-18 19:35:40,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199087692] [2021-12-18 19:35:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:40,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:40,288 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 19:35:40,322 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 19:35:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 19:35:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:40,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:40,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199087692] [2021-12-18 19:35:40,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199087692] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:40,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:40,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-18 19:35:40,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064300136] [2021-12-18 19:35:40,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:40,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:40,515 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:40,631 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-12-18 19:35:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:35:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:40,632 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:35:40,632 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:35:40,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:40,633 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:40,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:35:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-18 19:35:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-18 19:35:40,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 17 [2021-12-18 19:35:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:40,636 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-18 19:35:40,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-18 19:35:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:35:40,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:40,637 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-18 19:35:40,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-18 19:35:40,843 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 19:35:40,843 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-18 19:35:40,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178273396] [2021-12-18 19:35:40,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:40,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:40,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:40,846 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 19:35:40,846 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 19:35:40,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:40,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 19:35:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:40,913 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 8 treesize of output 7 [2021-12-18 19:35:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178273396] [2021-12-18 19:35:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178273396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:41,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-18 19:35:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737367650] [2021-12-18 19:35:41,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:35:41,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:35:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:41,920 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,167 INFO L93 Difference]: Finished difference Result 209 states and 234 transitions. [2021-12-18 19:35:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:35:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:35:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,169 INFO L225 Difference]: With dead ends: 209 [2021-12-18 19:35:44,169 INFO L226 Difference]: Without dead ends: 209 [2021-12-18 19:35:44,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:35:44,170 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 472 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 226 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 268 Invalid, 0 Unknown, 9 Unchecked, 1.3s Time] [2021-12-18 19:35:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-18 19:35:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 64. [2021-12-18 19:35:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-12-18 19:35:44,173 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 18 [2021-12-18 19:35:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,173 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-12-18 19:35:44,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-12-18 19:35:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:35:44,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,186 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 19:35:44,385 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 19:35:44,386 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -511718013, now seen corresponding path program 1 times [2021-12-18 19:35:44,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:44,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507918784] [2021-12-18 19:35:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:44,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:44,388 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 19:35:44,389 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 19:35:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:35:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:44,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:44,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:44,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507918784] [2021-12-18 19:35:44,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507918784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:44,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427512281] [2021-12-18 19:35:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:44,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:44,520 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,627 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-12-18 19:35:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:35:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,630 INFO L225 Difference]: With dead ends: 77 [2021-12-18 19:35:44,631 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 19:35:44,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:44,632 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 52 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 19:35:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-12-18 19:35:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-12-18 19:35:44,634 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 18 [2021-12-18 19:35:44,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,635 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-12-18 19:35:44,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-12-18 19:35:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:35:44,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,647 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 19:35:44,843 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 19:35:44,844 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-12-18 19:35:44,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:44,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379564245] [2021-12-18 19:35:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:44,846 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 19:35:44,847 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 19:35:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:35:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:44,909 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 8 treesize of output 7 [2021-12-18 19:35:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:45,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379564245] [2021-12-18 19:35:45,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379564245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:45,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:45,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-12-18 19:35:45,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100360468] [2021-12-18 19:35:45,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:45,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:35:45,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:35:45,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:45,888 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:46,273 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-12-18 19:35:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:35:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:35:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:46,274 INFO L225 Difference]: With dead ends: 84 [2021-12-18 19:35:46,274 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 19:35:46,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:35:46,275 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:46,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 140 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-12-18 19:35:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 19:35:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2021-12-18 19:35:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 76 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2021-12-18 19:35:46,277 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 18 [2021-12-18 19:35:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:46,278 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2021-12-18 19:35:46,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2021-12-18 19:35:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:35:46,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:46,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:46,287 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 19:35:46,485 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 19:35:46,485 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1331880655, now seen corresponding path program 1 times [2021-12-18 19:35:46,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625382400] [2021-12-18 19:35:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:46,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:46,487 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 19:35:46,488 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 19:35:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:46,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:35:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:46,559 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 8 treesize of output 7 [2021-12-18 19:35:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:46,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:47,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625382400] [2021-12-18 19:35:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625382400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:47,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:47,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-12-18 19:35:47,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050506109] [2021-12-18 19:35:47,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:47,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:35:47,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:35:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:47,728 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:48,376 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-12-18 19:35:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:35:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-18 19:35:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:48,378 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:35:48,378 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 19:35:48,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:35:48,378 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:48,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 124 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 25 Unchecked, 0.5s Time] [2021-12-18 19:35:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 19:35:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-12-18 19:35:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2021-12-18 19:35:48,380 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 19 [2021-12-18 19:35:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:48,380 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2021-12-18 19:35:48,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2021-12-18 19:35:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 19:35:48,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:48,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:48,389 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 19:35:48,587 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 19:35:48,587 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:48,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 2 times [2021-12-18 19:35:48,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:48,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790336675] [2021-12-18 19:35:48,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:48,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:48,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:48,588 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 19:35:48,589 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 19:35:48,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:48,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:48,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:35:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:48,663 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 8 treesize of output 7 [2021-12-18 19:35:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:49,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:50,479 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:50,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790336675] [2021-12-18 19:35:50,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790336675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:50,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:50,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-18 19:35:50,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388668848] [2021-12-18 19:35:50,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:50,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:35:50,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:35:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:50,481 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:52,694 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-12-18 19:35:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:35:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 19:35:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:52,697 INFO L225 Difference]: With dead ends: 118 [2021-12-18 19:35:52,697 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 19:35:52,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:35:52,698 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:52,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 187 Invalid, 0 Unknown, 23 Unchecked, 1.0s Time] [2021-12-18 19:35:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 19:35:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-12-18 19:35:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.263157894736842) internal successors, (120), 98 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2021-12-18 19:35:52,703 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 23 [2021-12-18 19:35:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:52,703 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2021-12-18 19:35:52,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2021-12-18 19:35:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:35:52,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:52,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:52,713 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 19:35:52,907 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 19:35:52,907 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2028106434, now seen corresponding path program 1 times [2021-12-18 19:35:52,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:52,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396259934] [2021-12-18 19:35:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:52,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:52,909 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 19:35:52,911 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 19:35:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:52,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:35:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:53,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:53,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:53,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396259934] [2021-12-18 19:35:53,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396259934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:53,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:53,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-18 19:35:53,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932347948] [2021-12-18 19:35:53,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:53,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:35:53,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:35:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:53,307 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:53,780 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2021-12-18 19:35:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:35:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:35:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:53,783 INFO L225 Difference]: With dead ends: 128 [2021-12-18 19:35:53,784 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 19:35:53,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:35:53,785 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:53,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 97 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 19:35:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2021-12-18 19:35:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 109 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-12-18 19:35:53,790 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 25 [2021-12-18 19:35:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:53,791 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-12-18 19:35:53,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-12-18 19:35:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 19:35:53,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:53,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:53,808 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 19:35:54,003 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 19:35:54,003 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1990878972, now seen corresponding path program 2 times [2021-12-18 19:35:54,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:54,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965726479] [2021-12-18 19:35:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:54,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:54,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:54,005 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 19:35:54,006 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 19:35:54,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 19:35:54,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:54,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:35:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 19:35:56,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:56,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:56,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965726479] [2021-12-18 19:35:56,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965726479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:56,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:56,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:56,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539613419] [2021-12-18 19:35:56,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:56,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:56,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:35:56,188 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:56,212 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2021-12-18 19:35:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-18 19:35:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:56,213 INFO L225 Difference]: With dead ends: 139 [2021-12-18 19:35:56,213 INFO L226 Difference]: Without dead ends: 132 [2021-12-18 19:35:56,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:35:56,214 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:56,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-18 19:35:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-18 19:35:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2021-12-18 19:35:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 123 states have (on average 1.2520325203252032) internal successors, (154), 126 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2021-12-18 19:35:56,217 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 28 [2021-12-18 19:35:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:56,218 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2021-12-18 19:35:56,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2021-12-18 19:35:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 19:35:56,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:56,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:56,226 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 19:35:56,426 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 19:35:56,426 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:56,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:56,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1795053594, now seen corresponding path program 1 times [2021-12-18 19:35:56,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:56,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431264740] [2021-12-18 19:35:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:56,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:56,428 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 19:35:56,430 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 19:35:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:35:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:35:56,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:57,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:35:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431264740] [2021-12-18 19:35:57,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431264740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:57,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:35:57,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-18 19:35:57,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490022564] [2021-12-18 19:35:57,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:57,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 19:35:57,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:35:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 19:35:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-18 19:35:57,073 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:57,989 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2021-12-18 19:35:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:35:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-18 19:35:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:57,990 INFO L225 Difference]: With dead ends: 151 [2021-12-18 19:35:57,991 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 19:35:57,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:57,991 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 226 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:57,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 123 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:35:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 19:35:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2021-12-18 19:35:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.2262773722627738) internal successors, (168), 140 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2021-12-18 19:35:57,994 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 31 [2021-12-18 19:35:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:57,994 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2021-12-18 19:35:57,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2021-12-18 19:35:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:35:57,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:57,995 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-18 19:35:58,004 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 19:35:58,204 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 19:35:58,204 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-18 19:35:58,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:35:58,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528357068] [2021-12-18 19:35:58,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:58,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:35:58,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:35:58,206 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 19:35:58,207 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 19:35:58,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 19:35:58,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:35:58,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:58,337 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 8 treesize of output 7 [2021-12-18 19:35:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:58,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:00,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:00,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528357068] [2021-12-18 19:36:00,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528357068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:00,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:00,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-18 19:36:00,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290378479] [2021-12-18 19:36:00,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:00,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:36:00,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:36:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:36:00,923 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:10,499 INFO L93 Difference]: Finished difference Result 1193 states and 1458 transitions. [2021-12-18 19:36:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:36:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:36:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:10,504 INFO L225 Difference]: With dead ends: 1193 [2021-12-18 19:36:10,504 INFO L226 Difference]: Without dead ends: 1193 [2021-12-18 19:36:10,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:36:10,505 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1843 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:10,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 895 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 846 Invalid, 0 Unknown, 99 Unchecked, 3.0s Time] [2021-12-18 19:36:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-12-18 19:36:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 173. [2021-12-18 19:36:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.2307692307692308) internal successors, (208), 172 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2021-12-18 19:36:10,515 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 34 [2021-12-18 19:36:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:10,515 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2021-12-18 19:36:10,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2021-12-18 19:36:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:36:10,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:10,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:10,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:10,726 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 19:36:10,727 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:10,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1553594099, now seen corresponding path program 1 times [2021-12-18 19:36:10,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:10,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62183382] [2021-12-18 19:36:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:10,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:10,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:10,728 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 19:36:10,730 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 19:36:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:36:10,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 19:36:12,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:36:12,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62183382] [2021-12-18 19:36:12,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62183382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:36:12,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:36:12,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:36:12,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151495096] [2021-12-18 19:36:12,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:36:12,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:36:12,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:12,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:36:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:36:12,982 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:12,988 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2021-12-18 19:36:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:36:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:36:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:12,989 INFO L225 Difference]: With dead ends: 172 [2021-12-18 19:36:12,989 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 19:36:12,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-18 19:36:12,990 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:12,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 40 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-18 19:36:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 19:36:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 134. [2021-12-18 19:36:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 133 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2021-12-18 19:36:13,004 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 34 [2021-12-18 19:36:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:13,004 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2021-12-18 19:36:13,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2021-12-18 19:36:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 19:36:13,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:13,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:13,014 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 19:36:13,212 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 19:36:13,213 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -403560393, now seen corresponding path program 2 times [2021-12-18 19:36:13,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:13,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119741520] [2021-12-18 19:36:13,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:13,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:13,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:13,214 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 19:36:13,215 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 19:36:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:36:13,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:13,294 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 8 treesize of output 7 [2021-12-18 19:36:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:36:13,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:36:14,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119741520] [2021-12-18 19:36:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119741520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:14,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-18 19:36:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938688228] [2021-12-18 19:36:14,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:14,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:36:14,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:36:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:36:14,355 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:14,551 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2021-12-18 19:36:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:36:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-18 19:36:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:14,552 INFO L225 Difference]: With dead ends: 154 [2021-12-18 19:36:14,552 INFO L226 Difference]: Without dead ends: 154 [2021-12-18 19:36:14,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:36:14,553 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:14,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 106 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2021-12-18 19:36:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-18 19:36:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-12-18 19:36:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 148 states have (on average 1.222972972972973) internal successors, (181), 150 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2021-12-18 19:36:14,557 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 35 [2021-12-18 19:36:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:14,557 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2021-12-18 19:36:14,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2021-12-18 19:36:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 19:36:14,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:14,558 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:14,566 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 19:36:14,763 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 19:36:14,763 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1302514410, now seen corresponding path program 2 times [2021-12-18 19:36:14,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670092063] [2021-12-18 19:36:14,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:14,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:14,765 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 19:36:14,766 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 19:36:14,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:14,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:36:14,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:14,845 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 8 treesize of output 7 [2021-12-18 19:36:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:15,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:16,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:16,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670092063] [2021-12-18 19:36:16,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670092063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:16,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:16,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-18 19:36:16,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801772402] [2021-12-18 19:36:16,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:16,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:36:16,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:36:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:36:16,694 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:19,555 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2021-12-18 19:36:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:36:19,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-18 19:36:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:19,557 INFO L225 Difference]: With dead ends: 178 [2021-12-18 19:36:19,557 INFO L226 Difference]: Without dead ends: 178 [2021-12-18 19:36:19,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:36:19,557 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:19,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 149 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2021-12-18 19:36:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-18 19:36:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2021-12-18 19:36:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 167 states have (on average 1.2634730538922156) internal successors, (211), 169 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2021-12-18 19:36:19,562 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 36 [2021-12-18 19:36:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:19,562 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2021-12-18 19:36:19,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2021-12-18 19:36:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 19:36:19,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:19,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:19,572 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 19:36:19,770 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 19:36:19,770 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1410862723, now seen corresponding path program 1 times [2021-12-18 19:36:19,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:19,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854245687] [2021-12-18 19:36:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:19,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:19,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:19,772 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 19:36:19,773 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 19:36:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:36:19,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:19,853 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 8 treesize of output 7 [2021-12-18 19:36:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:20,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:21,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854245687] [2021-12-18 19:36:21,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854245687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:21,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:21,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-18 19:36:21,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308431873] [2021-12-18 19:36:21,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:21,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:36:21,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:36:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:36:21,786 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:22,529 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2021-12-18 19:36:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:36:22,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-18 19:36:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:22,532 INFO L225 Difference]: With dead ends: 190 [2021-12-18 19:36:22,532 INFO L226 Difference]: Without dead ends: 190 [2021-12-18 19:36:22,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:36:22,532 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:22,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 145 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2021-12-18 19:36:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-18 19:36:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2021-12-18 19:36:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 180 states have (on average 1.261111111111111) internal successors, (227), 182 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 227 transitions. [2021-12-18 19:36:22,539 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 227 transitions. Word has length 37 [2021-12-18 19:36:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:22,539 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 227 transitions. [2021-12-18 19:36:22,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 227 transitions. [2021-12-18 19:36:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 19:36:22,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:22,540 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:22,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-18 19:36:22,747 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 19:36:22,747 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1723241033, now seen corresponding path program 3 times [2021-12-18 19:36:22,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:22,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893245073] [2021-12-18 19:36:22,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:22,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:22,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:22,749 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 19:36:22,750 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 19:36:22,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:36:22,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:36:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:22,883 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 8 treesize of output 7 [2021-12-18 19:36:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:23,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:25,566 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893245073] [2021-12-18 19:36:25,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893245073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:25,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:25,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-12-18 19:36:25,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126465335] [2021-12-18 19:36:25,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:25,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:36:25,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:36:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:36:25,567 INFO L87 Difference]: Start difference. First operand 183 states and 227 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:26,663 INFO L93 Difference]: Finished difference Result 207 states and 255 transitions. [2021-12-18 19:36:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:36:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-18 19:36:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:26,665 INFO L225 Difference]: With dead ends: 207 [2021-12-18 19:36:26,665 INFO L226 Difference]: Without dead ends: 206 [2021-12-18 19:36:26,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:36:26,665 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:26,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 181 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 12 Unchecked, 0.9s Time] [2021-12-18 19:36:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-18 19:36:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 201. [2021-12-18 19:36:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.2575757575757576) internal successors, (249), 200 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 249 transitions. [2021-12-18 19:36:26,668 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 249 transitions. Word has length 37 [2021-12-18 19:36:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:26,668 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 249 transitions. [2021-12-18 19:36:26,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 249 transitions. [2021-12-18 19:36:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-18 19:36:26,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:26,669 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:26,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:26,869 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 19:36:26,869 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 1 times [2021-12-18 19:36:26,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:26,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716356732] [2021-12-18 19:36:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:26,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:26,871 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 19:36:26,872 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 19:36:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:26,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:36:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:27,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:27,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716356732] [2021-12-18 19:36:27,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716356732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:27,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:27,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-12-18 19:36:27,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639946244] [2021-12-18 19:36:27,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:27,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:36:27,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:36:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:36:27,591 INFO L87 Difference]: Start difference. First operand 201 states and 249 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:29,103 INFO L93 Difference]: Finished difference Result 287 states and 348 transitions. [2021-12-18 19:36:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:36:29,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-18 19:36:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:29,104 INFO L225 Difference]: With dead ends: 287 [2021-12-18 19:36:29,104 INFO L226 Difference]: Without dead ends: 265 [2021-12-18 19:36:29,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:36:29,105 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 340 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:29,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 150 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:36:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-18 19:36:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-12-18 19:36:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.2567567567567568) internal successors, (279), 224 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 279 transitions. [2021-12-18 19:36:29,108 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 279 transitions. Word has length 39 [2021-12-18 19:36:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:29,108 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 279 transitions. [2021-12-18 19:36:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 279 transitions. [2021-12-18 19:36:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:36:29,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:29,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:29,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:29,309 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 19:36:29,310 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash 799217830, now seen corresponding path program 4 times [2021-12-18 19:36:29,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:29,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600500200] [2021-12-18 19:36:29,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:29,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:29,324 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 19:36:29,326 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 19:36:29,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:36:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:29,432 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 8 treesize of output 7 [2021-12-18 19:36:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:30,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:31,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600500200] [2021-12-18 19:36:31,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600500200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:31,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:31,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-18 19:36:31,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308940561] [2021-12-18 19:36:31,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:31,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:36:31,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:36:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:36:31,802 INFO L87 Difference]: Start difference. First operand 225 states and 279 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:44,314 INFO L93 Difference]: Finished difference Result 435 states and 532 transitions. [2021-12-18 19:36:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:36:44,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-18 19:36:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:44,316 INFO L225 Difference]: With dead ends: 435 [2021-12-18 19:36:44,316 INFO L226 Difference]: Without dead ends: 435 [2021-12-18 19:36:44,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=762, Invalid=1890, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:36:44,317 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 481 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:44,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 207 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 442 Invalid, 0 Unknown, 124 Unchecked, 4.1s Time] [2021-12-18 19:36:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-18 19:36:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 384. [2021-12-18 19:36:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 381 states have (on average 1.2755905511811023) internal successors, (486), 383 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 486 transitions. [2021-12-18 19:36:44,323 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 486 transitions. Word has length 41 [2021-12-18 19:36:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:44,324 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 486 transitions. [2021-12-18 19:36:44,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 486 transitions. [2021-12-18 19:36:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:36:44,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:44,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:44,337 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 19:36:44,534 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 19:36:44,534 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1388873166, now seen corresponding path program 1 times [2021-12-18 19:36:44,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:44,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160679847] [2021-12-18 19:36:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:44,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:44,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:44,536 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 19:36:44,537 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 19:36:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:36:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:44,637 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 8 treesize of output 7 [2021-12-18 19:36:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:45,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:46,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:46,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160679847] [2021-12-18 19:36:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160679847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:46,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:46,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-12-18 19:36:46,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038759181] [2021-12-18 19:36:46,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:46,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 19:36:46,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 19:36:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-18 19:36:46,508 INFO L87 Difference]: Start difference. First operand 384 states and 486 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:47,683 INFO L93 Difference]: Finished difference Result 391 states and 487 transitions. [2021-12-18 19:36:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:36:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-18 19:36:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:47,685 INFO L225 Difference]: With dead ends: 391 [2021-12-18 19:36:47,685 INFO L226 Difference]: Without dead ends: 381 [2021-12-18 19:36:47,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:36:47,686 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 322 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:47,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 95 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 184 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2021-12-18 19:36:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-18 19:36:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 327. [2021-12-18 19:36:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 324 states have (on average 1.2222222222222223) internal successors, (396), 326 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 396 transitions. [2021-12-18 19:36:47,689 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 396 transitions. Word has length 41 [2021-12-18 19:36:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:47,689 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 396 transitions. [2021-12-18 19:36:47,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 396 transitions. [2021-12-18 19:36:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 19:36:47,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:47,690 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:47,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-18 19:36:47,895 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 19:36:47,895 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -990897512, now seen corresponding path program 2 times [2021-12-18 19:36:47,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356540376] [2021-12-18 19:36:47,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:47,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:47,897 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 19:36:47,898 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 19:36:47,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:47,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:47,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:36:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 19:36:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:36:49,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:49,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356540376] [2021-12-18 19:36:49,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356540376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:49,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:49,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-12-18 19:36:49,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010565900] [2021-12-18 19:36:49,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:49,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:36:49,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:36:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:36:49,067 INFO L87 Difference]: Start difference. First operand 327 states and 396 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:50,379 INFO L93 Difference]: Finished difference Result 343 states and 409 transitions. [2021-12-18 19:36:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:36:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-18 19:36:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:50,381 INFO L225 Difference]: With dead ends: 343 [2021-12-18 19:36:50,381 INFO L226 Difference]: Without dead ends: 309 [2021-12-18 19:36:50,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:36:50,382 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:50,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 216 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 19:36:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-18 19:36:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-12-18 19:36:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 306 states have (on average 1.2222222222222223) internal successors, (374), 308 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 374 transitions. [2021-12-18 19:36:50,386 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 374 transitions. Word has length 44 [2021-12-18 19:36:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:50,386 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 374 transitions. [2021-12-18 19:36:50,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 374 transitions. [2021-12-18 19:36:50,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 19:36:50,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:50,387 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:50,404 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 19:36:50,594 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 19:36:50,594 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -187817573, now seen corresponding path program 3 times [2021-12-18 19:36:50,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:50,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944241580] [2021-12-18 19:36:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:50,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:50,596 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 19:36:50,597 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 19:36:50,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 19:36:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:36:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:50,662 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 8 treesize of output 7 [2021-12-18 19:36:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-18 19:36:51,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-18 19:36:52,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944241580] [2021-12-18 19:36:52,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944241580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:52,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:52,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-12-18 19:36:52,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718587254] [2021-12-18 19:36:52,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:52,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:36:52,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:36:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:36:52,167 INFO L87 Difference]: Start difference. First operand 309 states and 374 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:53,248 INFO L93 Difference]: Finished difference Result 383 states and 469 transitions. [2021-12-18 19:36:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:36:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-18 19:36:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:53,250 INFO L225 Difference]: With dead ends: 383 [2021-12-18 19:36:53,250 INFO L226 Difference]: Without dead ends: 383 [2021-12-18 19:36:53,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:36:53,251 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:53,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 69 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2021-12-18 19:36:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-18 19:36:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 361. [2021-12-18 19:36:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 358 states have (on average 1.2402234636871508) internal successors, (444), 360 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 444 transitions. [2021-12-18 19:36:53,255 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 444 transitions. Word has length 48 [2021-12-18 19:36:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:53,256 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 444 transitions. [2021-12-18 19:36:53,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 444 transitions. [2021-12-18 19:36:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 19:36:53,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:53,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:53,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-18 19:36:53,457 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 19:36:53,457 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:53,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1527377480, now seen corresponding path program 3 times [2021-12-18 19:36:53,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:36:53,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190385014] [2021-12-18 19:36:53,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:53,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:36:53,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:36:53,459 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 19:36:53,460 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 19:36:53,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 19:36:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:36:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:53,534 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 8 treesize of output 7 [2021-12-18 19:36:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 19:36:54,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 19:36:56,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:36:56,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190385014] [2021-12-18 19:36:56,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190385014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:56,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:36:56,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-18 19:36:56,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39697486] [2021-12-18 19:36:56,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:56,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:36:56,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:36:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:36:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:36:56,558 INFO L87 Difference]: Start difference. First operand 361 states and 444 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:02,408 INFO L93 Difference]: Finished difference Result 387 states and 467 transitions. [2021-12-18 19:37:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:37:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-18 19:37:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:02,411 INFO L225 Difference]: With dead ends: 387 [2021-12-18 19:37:02,411 INFO L226 Difference]: Without dead ends: 387 [2021-12-18 19:37:02,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:37:02,412 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 245 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:02,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 138 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 311 Invalid, 0 Unknown, 22 Unchecked, 1.7s Time] [2021-12-18 19:37:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-18 19:37:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 361. [2021-12-18 19:37:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 358 states have (on average 1.223463687150838) internal successors, (438), 360 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 438 transitions. [2021-12-18 19:37:02,433 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 438 transitions. Word has length 49 [2021-12-18 19:37:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:02,433 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 438 transitions. [2021-12-18 19:37:02,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 438 transitions. [2021-12-18 19:37:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:37:02,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:02,434 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:02,445 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 19:37:02,641 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 19:37:02,641 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:02,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1579950574, now seen corresponding path program 2 times [2021-12-18 19:37:02,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:37:02,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136637706] [2021-12-18 19:37:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:37:02,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:37:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:37:02,643 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 19:37:02,644 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 19:37:02,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:37:02,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:37:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:02,747 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 8 treesize of output 7 [2021-12-18 19:37:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:37:03,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:37:05,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:37:05,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136637706] [2021-12-18 19:37:05,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136637706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:05,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:37:05,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-12-18 19:37:05,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206672063] [2021-12-18 19:37:05,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:05,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:37:05,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:37:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:37:05,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:37:05,802 INFO L87 Difference]: Start difference. First operand 361 states and 438 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:11,248 INFO L93 Difference]: Finished difference Result 506 states and 623 transitions. [2021-12-18 19:37:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:37:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-18 19:37:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:11,250 INFO L225 Difference]: With dead ends: 506 [2021-12-18 19:37:11,250 INFO L226 Difference]: Without dead ends: 506 [2021-12-18 19:37:11,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=361, Invalid=1199, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:37:11,251 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:11,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 178 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2021-12-18 19:37:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-12-18 19:37:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 473. [2021-12-18 19:37:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 470 states have (on average 1.2404255319148936) internal successors, (583), 472 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 583 transitions. [2021-12-18 19:37:11,256 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 583 transitions. Word has length 51 [2021-12-18 19:37:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:11,257 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 583 transitions. [2021-12-18 19:37:11,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 583 transitions. [2021-12-18 19:37:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 19:37:11,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:11,258 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:11,269 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 19:37:11,465 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 19:37:11,465 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 737382308, now seen corresponding path program 1 times [2021-12-18 19:37:11,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:37:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580204337] [2021-12-18 19:37:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:11,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:37:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:37:11,466 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 19:37:11,467 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 19:37:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 19:37:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:11,574 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 8 treesize of output 7 [2021-12-18 19:37:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:37:12,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:37:14,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:37:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580204337] [2021-12-18 19:37:14,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580204337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:14,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:37:14,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-12-18 19:37:14,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662348067] [2021-12-18 19:37:14,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:14,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:37:14,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:37:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:37:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:37:14,348 INFO L87 Difference]: Start difference. First operand 473 states and 583 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:20,581 INFO L93 Difference]: Finished difference Result 615 states and 731 transitions. [2021-12-18 19:37:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:37:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-18 19:37:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:20,583 INFO L225 Difference]: With dead ends: 615 [2021-12-18 19:37:20,583 INFO L226 Difference]: Without dead ends: 615 [2021-12-18 19:37:20,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:37:20,584 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 764 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:20,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 258 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 402 Invalid, 0 Unknown, 151 Unchecked, 1.5s Time] [2021-12-18 19:37:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-18 19:37:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 235. [2021-12-18 19:37:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.1587982832618027) internal successors, (270), 234 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-12-18 19:37:20,588 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 54 [2021-12-18 19:37:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:20,588 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-12-18 19:37:20,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-12-18 19:37:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 19:37:20,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:20,593 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:20,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-18 19:37:20,793 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 19:37:20,794 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1008871624, now seen corresponding path program 4 times [2021-12-18 19:37:20,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:37:20,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448118885] [2021-12-18 19:37:20,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:37:20,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:37:20,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:37:20,796 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 19:37:20,797 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 19:37:20,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:37:20,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:37:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 76 proven. 50 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 19:37:21,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 83 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 19:37:22,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:37:22,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448118885] [2021-12-18 19:37:22,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448118885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:22,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:37:22,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-12-18 19:37:22,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986082873] [2021-12-18 19:37:22,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:22,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 19:37:22,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:37:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 19:37:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:37:22,059 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:24,750 INFO L93 Difference]: Finished difference Result 298 states and 336 transitions. [2021-12-18 19:37:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 19:37:24,751 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-18 19:37:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:24,752 INFO L225 Difference]: With dead ends: 298 [2021-12-18 19:37:24,752 INFO L226 Difference]: Without dead ends: 248 [2021-12-18 19:37:24,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=535, Invalid=2015, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:37:24,753 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 576 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:24,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 218 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-18 19:37:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-18 19:37:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2021-12-18 19:37:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 281 transitions. [2021-12-18 19:37:24,757 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 281 transitions. Word has length 64 [2021-12-18 19:37:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 281 transitions. [2021-12-18 19:37:24,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 281 transitions. [2021-12-18 19:37:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:37:24,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:24,759 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-12-18 19:37:24,778 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 19:37:24,969 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 19:37:24,969 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-12-18 19:37:24,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:37:24,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370972653] [2021-12-18 19:37:24,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:37:24,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:37:24,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:37:24,971 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 19:37:24,972 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 19:37:25,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:37:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:37:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:25,110 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 8 treesize of output 7 [2021-12-18 19:37:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:26,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:35,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:37:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370972653] [2021-12-18 19:37:35,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370972653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:35,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:37:35,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-12-18 19:37:35,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782132762] [2021-12-18 19:37:35,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:37:35,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:37:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:37:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1524, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:37:35,849 INFO L87 Difference]: Start difference. First operand 246 states and 281 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:47,737 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:37:49,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:37:51,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:37:53,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:37:55,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:02,701 WARN L227 SmtUtils]: Spent 6.69s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:38:17,096 WARN L227 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:38:18,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:21,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:23,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:25,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:31,036 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:38:42,474 WARN L227 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:38:45,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:47,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:38:49,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:03,062 WARN L227 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:39:06,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:08,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:10,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:21,115 WARN L227 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:39:23,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:25,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:27,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:37,822 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:39:40,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:42,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:44,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:55,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:57,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:39:59,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:08,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:10,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:17,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:19,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:25,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:27,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:33,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:35,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:39,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:43,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:40:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:47,769 INFO L93 Difference]: Finished difference Result 4964 states and 5613 transitions. [2021-12-18 19:40:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 19:40:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-18 19:40:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:47,788 INFO L225 Difference]: With dead ends: 4964 [2021-12-18 19:40:47,788 INFO L226 Difference]: Without dead ends: 4964 [2021-12-18 19:40:47,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 121.1s TimeCoverageRelationStatistics Valid=2172, Invalid=5138, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 19:40:47,790 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 5179 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 3394 mSolverCounterSat, 159 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5179 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3394 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 77.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:47,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5179 Valid, 2832 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3394 Invalid, 30 Unknown, 189 Unchecked, 77.1s Time] [2021-12-18 19:40:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2021-12-18 19:40:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 310. [2021-12-18 19:40:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 308 states have (on average 1.172077922077922) internal successors, (361), 309 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 361 transitions. [2021-12-18 19:40:47,807 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 361 transitions. Word has length 66 [2021-12-18 19:40:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:47,807 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 361 transitions. [2021-12-18 19:40:47,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 361 transitions. [2021-12-18 19:40:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:40:47,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:47,809 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:47,819 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 19:40:48,016 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 19:40:48,017 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash -862230518, now seen corresponding path program 5 times [2021-12-18 19:40:48,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:40:48,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932806164] [2021-12-18 19:40:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:40:48,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:40:48,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:40:48,019 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 19:40:48,020 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 19:40:48,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-18 19:40:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:40:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:48,329 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 8 treesize of output 7 [2021-12-18 19:40:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 66 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:40:49,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:54,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:40:54,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932806164] [2021-12-18 19:40:54,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932806164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:54,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:40:54,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-12-18 19:40:54,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627282215] [2021-12-18 19:40:54,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:54,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:40:54,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:40:54,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:40:54,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:40:54,434 INFO L87 Difference]: Start difference. First operand 310 states and 361 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:58,718 INFO L93 Difference]: Finished difference Result 411 states and 477 transitions. [2021-12-18 19:40:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:40:58,720 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-18 19:40:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:58,721 INFO L225 Difference]: With dead ends: 411 [2021-12-18 19:40:58,721 INFO L226 Difference]: Without dead ends: 407 [2021-12-18 19:40:58,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:40:58,721 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:58,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 525 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 583 Invalid, 0 Unknown, 53 Unchecked, 3.1s Time] [2021-12-18 19:40:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-18 19:40:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 367. [2021-12-18 19:40:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 365 states have (on average 1.1835616438356165) internal successors, (432), 366 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 432 transitions. [2021-12-18 19:40:58,726 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 432 transitions. Word has length 66 [2021-12-18 19:40:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:58,726 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 432 transitions. [2021-12-18 19:40:58,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 432 transitions. [2021-12-18 19:40:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 19:40:58,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:58,727 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:58,737 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 19:40:58,935 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 19:40:58,935 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash -713112109, now seen corresponding path program 1 times [2021-12-18 19:40:58,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:40:58,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11298629] [2021-12-18 19:40:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:58,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:40:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:40:58,937 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 19:40:58,938 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 19:40:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:40:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:59,076 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 8 treesize of output 7 [2021-12-18 19:41:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 66 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:41:00,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:05,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:41:05,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11298629] [2021-12-18 19:41:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11298629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:05,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:41:05,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-12-18 19:41:05,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994962294] [2021-12-18 19:41:05,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:05,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:41:05,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:41:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:41:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:41:05,248 INFO L87 Difference]: Start difference. First operand 367 states and 432 transitions. Second operand has 35 states, 35 states have (on average 3.942857142857143) internal successors, (138), 35 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:09,167 INFO L93 Difference]: Finished difference Result 545 states and 645 transitions. [2021-12-18 19:41:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:41:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.942857142857143) internal successors, (138), 35 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-18 19:41:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:09,170 INFO L225 Difference]: With dead ends: 545 [2021-12-18 19:41:09,170 INFO L226 Difference]: Without dead ends: 541 [2021-12-18 19:41:09,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:41:09,171 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 113 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:09,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 659 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 545 Invalid, 0 Unknown, 91 Unchecked, 2.7s Time] [2021-12-18 19:41:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-18 19:41:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 454. [2021-12-18 19:41:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 452 states have (on average 1.1991150442477876) internal successors, (542), 453 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 542 transitions. [2021-12-18 19:41:09,179 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 542 transitions. Word has length 72 [2021-12-18 19:41:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:09,179 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 542 transitions. [2021-12-18 19:41:09,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.942857142857143) internal successors, (138), 35 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 542 transitions. [2021-12-18 19:41:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 19:41:09,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:09,180 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:09,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-18 19:41:09,388 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 19:41:09,389 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 898004385, now seen corresponding path program 2 times [2021-12-18 19:41:09,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:41:09,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95920769] [2021-12-18 19:41:09,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:41:09,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:41:09,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:41:09,390 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 19:41:09,391 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 19:41:09,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:41:09,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:41:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:09,521 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 8 treesize of output 7 [2021-12-18 19:41:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 8 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:10,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:15,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:41:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95920769] [2021-12-18 19:41:15,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95920769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:15,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:41:15,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-12-18 19:41:15,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52037725] [2021-12-18 19:41:15,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:15,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:41:15,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:41:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:41:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:41:15,696 INFO L87 Difference]: Start difference. First operand 454 states and 542 transitions. Second operand has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 37 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:22,414 INFO L93 Difference]: Finished difference Result 902 states and 1077 transitions. [2021-12-18 19:41:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:41:22,416 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 37 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-18 19:41:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:22,417 INFO L225 Difference]: With dead ends: 902 [2021-12-18 19:41:22,417 INFO L226 Difference]: Without dead ends: 900 [2021-12-18 19:41:22,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:41:22,418 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 208 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:22,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 515 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 665 Invalid, 0 Unknown, 180 Unchecked, 4.6s Time] [2021-12-18 19:41:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-18 19:41:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 696. [2021-12-18 19:41:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 694 states have (on average 1.201729106628242) internal successors, (834), 695 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 834 transitions. [2021-12-18 19:41:22,424 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 834 transitions. Word has length 72 [2021-12-18 19:41:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:22,425 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 834 transitions. [2021-12-18 19:41:22,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 37 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 834 transitions. [2021-12-18 19:41:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 19:41:22,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:22,426 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:22,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-18 19:41:22,626 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 19:41:22,626 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:22,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1851286253, now seen corresponding path program 3 times [2021-12-18 19:41:22,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:41:22,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281389972] [2021-12-18 19:41:22,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:41:22,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:41:22,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:41:22,628 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 19:41:22,630 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 19:41:22,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:41:22,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:41:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:22,911 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 8 treesize of output 7 [2021-12-18 19:41:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 126 proven. 28 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 19:41:25,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 38 proven. 116 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 19:41:44,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:41:44,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281389972] [2021-12-18 19:41:44,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281389972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:44,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:41:44,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-12-18 19:41:44,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094289955] [2021-12-18 19:41:44,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:44,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:41:44,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:41:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:41:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:41:44,587 INFO L87 Difference]: Start difference. First operand 696 states and 834 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:45,369 INFO L93 Difference]: Finished difference Result 828 states and 985 transitions. [2021-12-18 19:41:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:41:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-18 19:41:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:45,373 INFO L225 Difference]: With dead ends: 828 [2021-12-18 19:41:45,373 INFO L226 Difference]: Without dead ends: 814 [2021-12-18 19:41:45,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:41:45,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:45,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2021-12-18 19:41:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-18 19:41:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 703. [2021-12-18 19:41:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 701 states have (on average 1.1982881597717547) internal successors, (840), 702 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 840 transitions. [2021-12-18 19:41:45,383 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 840 transitions. Word has length 72 [2021-12-18 19:41:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:45,384 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 840 transitions. [2021-12-18 19:41:45,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 840 transitions. [2021-12-18 19:41:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:41:45,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:45,386 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:45,405 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 19:41:45,595 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 19:41:45,596 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash 313896113, now seen corresponding path program 5 times [2021-12-18 19:41:45,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:41:45,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880607514] [2021-12-18 19:41:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:41:45,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:41:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:41:45,598 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 19:41:45,598 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 19:41:46,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 19:41:46,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:41:46,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 68 proven. 104 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-18 19:41:46,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 68 proven. 104 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-18 19:41:48,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:41:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880607514] [2021-12-18 19:41:48,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880607514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:48,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:41:48,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-18 19:41:48,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339354327] [2021-12-18 19:41:48,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:48,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 19:41:48,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:41:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 19:41:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:41:48,300 INFO L87 Difference]: Start difference. First operand 703 states and 840 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:50,385 INFO L93 Difference]: Finished difference Result 702 states and 814 transitions. [2021-12-18 19:41:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:41:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-18 19:41:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:50,387 INFO L225 Difference]: With dead ends: 702 [2021-12-18 19:41:50,387 INFO L226 Difference]: Without dead ends: 605 [2021-12-18 19:41:50,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:41:50,388 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 258 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:50,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 454 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-18 19:41:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-18 19:41:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 588. [2021-12-18 19:41:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 586 states have (on average 1.1791808873720135) internal successors, (691), 587 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 691 transitions. [2021-12-18 19:41:50,393 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 691 transitions. Word has length 73 [2021-12-18 19:41:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 691 transitions. [2021-12-18 19:41:50,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 691 transitions. [2021-12-18 19:41:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-18 19:41:50,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:50,395 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:50,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:50,605 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 19:41:50,605 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:50,606 INFO L85 PathProgramCache]: Analyzing trace with hash -992754877, now seen corresponding path program 6 times [2021-12-18 19:41:50,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:41:50,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687355275] [2021-12-18 19:41:50,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:41:50,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:41:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:41:50,607 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 19:41:50,611 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 19:41:51,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-18 19:41:51,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:41:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:51,153 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 8 treesize of output 7 [2021-12-18 19:41:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 9 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:53,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:01,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:42:01,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687355275] [2021-12-18 19:42:01,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687355275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:01,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:42:01,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2021-12-18 19:42:01,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684526595] [2021-12-18 19:42:01,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:01,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:42:01,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:42:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:42:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:42:01,328 INFO L87 Difference]: Start difference. First operand 588 states and 691 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:46,173 INFO L93 Difference]: Finished difference Result 1307 states and 1509 transitions. [2021-12-18 19:42:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 19:42:46,176 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-18 19:42:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:46,179 INFO L225 Difference]: With dead ends: 1307 [2021-12-18 19:42:46,179 INFO L226 Difference]: Without dead ends: 1301 [2021-12-18 19:42:46,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=1226, Invalid=6784, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 19:42:46,180 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1641 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:46,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1641 Valid, 1632 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2457 Invalid, 0 Unknown, 600 Unchecked, 21.4s Time] [2021-12-18 19:42:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-12-18 19:42:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 791. [2021-12-18 19:42:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 789 states have (on average 1.185044359949303) internal successors, (935), 790 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 935 transitions. [2021-12-18 19:42:46,188 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 935 transitions. Word has length 75 [2021-12-18 19:42:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:46,189 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 935 transitions. [2021-12-18 19:42:46,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 935 transitions. [2021-12-18 19:42:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 19:42:46,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:46,190 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:46,202 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 19:42:46,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:42:46,400 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:42:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash 330617238, now seen corresponding path program 4 times [2021-12-18 19:42:46,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:42:46,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343250611] [2021-12-18 19:42:46,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:42:46,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:42:46,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:42:46,402 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:42:46,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-18 19:42:46,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:42:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:42:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:46,566 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 8 treesize of output 7 [2021-12-18 19:42:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:42:48,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:55,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:42:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343250611] [2021-12-18 19:42:55,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343250611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:55,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:42:55,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-12-18 19:42:55,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524659765] [2021-12-18 19:42:55,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:42:55,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:42:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:42:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:42:55,265 INFO L87 Difference]: Start difference. First operand 791 states and 935 transitions. Second operand has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:27,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:43:35,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:43:48,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:43:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:51,341 INFO L93 Difference]: Finished difference Result 1371 states and 1600 transitions. [2021-12-18 19:43:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-18 19:43:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-18 19:43:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:51,346 INFO L225 Difference]: With dead ends: 1371 [2021-12-18 19:43:51,346 INFO L226 Difference]: Without dead ends: 1365 [2021-12-18 19:43:51,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=891, Invalid=7119, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 19:43:51,346 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 646 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 30.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:51,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 1502 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2562 Invalid, 0 Unknown, 573 Unchecked, 30.3s Time] [2021-12-18 19:43:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-12-18 19:43:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1146. [2021-12-18 19:43:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1144 states have (on average 1.1826923076923077) internal successors, (1353), 1145 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1353 transitions. [2021-12-18 19:43:51,356 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1353 transitions. Word has length 76 [2021-12-18 19:43:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:51,356 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1353 transitions. [2021-12-18 19:43:51,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1353 transitions. [2021-12-18 19:43:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 19:43:51,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:51,357 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:51,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-12-18 19:43:51,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:43:51,566 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:43:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1620134628, now seen corresponding path program 5 times [2021-12-18 19:43:51,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:43:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716160058] [2021-12-18 19:43:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:43:51,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:43:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:43:51,567 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:43:51,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-18 19:43:51,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-18 19:43:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:43:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:51,946 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 8 treesize of output 7 [2021-12-18 19:43:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:43:53,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:44:00,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:44:00,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716160058] [2021-12-18 19:44:00,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716160058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:00,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:44:00,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-12-18 19:44:00,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570801630] [2021-12-18 19:44:00,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:44:00,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:44:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:44:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:44:00,306 INFO L87 Difference]: Start difference. First operand 1146 states and 1353 transitions. Second operand has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:11,319 INFO L93 Difference]: Finished difference Result 2351 states and 2734 transitions. [2021-12-18 19:45:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 19:45:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-18 19:45:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:11,327 INFO L225 Difference]: With dead ends: 2351 [2021-12-18 19:45:11,327 INFO L226 Difference]: Without dead ends: 2336 [2021-12-18 19:45:11,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 120 SyntacticMatches, 38 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=1083, Invalid=6399, Unknown=0, NotChecked=0, Total=7482 [2021-12-18 19:45:11,328 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1474 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 636 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:11,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1474 Valid, 1643 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2285 Invalid, 0 Unknown, 636 Unchecked, 18.5s Time] [2021-12-18 19:45:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-12-18 19:45:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1735. [2021-12-18 19:45:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1733 states have (on average 1.1806116560877091) internal successors, (2046), 1734 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2046 transitions. [2021-12-18 19:45:11,354 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2046 transitions. Word has length 76 [2021-12-18 19:45:11,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:11,354 INFO L470 AbstractCegarLoop]: Abstraction has 1735 states and 2046 transitions. [2021-12-18 19:45:11,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2046 transitions. [2021-12-18 19:45:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 19:45:11,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:11,362 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:11,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-18 19:45:11,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:45:11,575 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash 589202625, now seen corresponding path program 2 times [2021-12-18 19:45:11,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:45:11,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729637822] [2021-12-18 19:45:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:45:11,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:45:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:45:11,577 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:45:11,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 19:45:11,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:45:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:11,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:45:11,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 107 proven. 46 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-18 19:45:12,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 121 proven. 83 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-18 19:45:14,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:45:14,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729637822] [2021-12-18 19:45:14,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729637822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:14,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:45:14,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-12-18 19:45:14,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396021140] [2021-12-18 19:45:14,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:14,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:45:14,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:45:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:45:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:45:14,323 INFO L87 Difference]: Start difference. First operand 1735 states and 2046 transitions. Second operand has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 29 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:19,645 INFO L93 Difference]: Finished difference Result 1617 states and 1867 transitions. [2021-12-18 19:45:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:45:19,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 29 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-18 19:45:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:19,654 INFO L225 Difference]: With dead ends: 1617 [2021-12-18 19:45:19,654 INFO L226 Difference]: Without dead ends: 1543 [2021-12-18 19:45:19,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=628, Invalid=2564, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:45:19,654 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 752 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:19,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 386 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-18 19:45:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-12-18 19:45:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1248. [2021-12-18 19:45:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1246 states have (on average 1.1637239165329052) internal successors, (1450), 1247 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1450 transitions. [2021-12-18 19:45:19,664 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1450 transitions. Word has length 80 [2021-12-18 19:45:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:19,664 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1450 transitions. [2021-12-18 19:45:19,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 29 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1450 transitions. [2021-12-18 19:45:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 19:45:19,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:19,666 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:19,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-18 19:45:19,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:45:19,870 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash -703196838, now seen corresponding path program 6 times [2021-12-18 19:45:19,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:45:19,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525062773] [2021-12-18 19:45:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:45:19,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:45:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:45:19,872 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:45:19,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-18 19:45:20,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-18 19:45:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:45:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:20,322 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 8 treesize of output 7 [2021-12-18 19:45:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:45:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:45:32,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:45:32,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525062773] [2021-12-18 19:45:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525062773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:32,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:45:32,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-12-18 19:45:32,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463839586] [2021-12-18 19:45:32,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:32,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:45:32,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:45:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:45:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:45:32,151 INFO L87 Difference]: Start difference. First operand 1248 states and 1450 transitions. Second operand has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:44,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:45:56,148 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 138 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:45:58,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:46:15,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:46:30,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:46:44,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:46:54,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 19:47:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:47:14,918 INFO L93 Difference]: Finished difference Result 1894 states and 2208 transitions. [2021-12-18 19:47:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-18 19:47:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-18 19:47:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:47:14,924 INFO L225 Difference]: With dead ends: 1894 [2021-12-18 19:47:14,924 INFO L226 Difference]: Without dead ends: 1894 [2021-12-18 19:47:14,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5017 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=3231, Invalid=10575, Unknown=0, NotChecked=0, Total=13806 [2021-12-18 19:47:14,925 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1362 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:47:14,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 801 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1846 Invalid, 2 Unknown, 136 Unchecked, 23.6s Time] [2021-12-18 19:47:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-12-18 19:47:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1532. [2021-12-18 19:47:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1530 states have (on average 1.1699346405228759) internal successors, (1790), 1531 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1790 transitions. [2021-12-18 19:47:14,938 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1790 transitions. Word has length 81 [2021-12-18 19:47:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:47:14,939 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 1790 transitions. [2021-12-18 19:47:14,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1790 transitions. [2021-12-18 19:47:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 19:47:14,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:47:14,940 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:47:14,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-18 19:47:15,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:47:15,151 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:47:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:47:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash -697823554, now seen corresponding path program 6 times [2021-12-18 19:47:15,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:47:15,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241957336] [2021-12-18 19:47:15,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:47:15,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:47:15,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:47:15,153 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:47:15,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-18 19:47:15,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-18 19:47:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:47:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:47:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:47:15,481 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 8 treesize of output 7 [2021-12-18 19:47:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-18 19:47:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:47:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 33 proven. 180 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-18 19:47:25,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:47:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241957336] [2021-12-18 19:47:25,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241957336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:47:25,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:47:25,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-12-18 19:47:25,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49717414] [2021-12-18 19:47:25,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:47:25,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:47:25,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:47:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:47:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:47:25,971 INFO L87 Difference]: Start difference. First operand 1532 states and 1790 transitions. Second operand has 37 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:48:09,499 INFO L93 Difference]: Finished difference Result 1741 states and 2013 transitions. [2021-12-18 19:48:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-18 19:48:09,501 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-18 19:48:09,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:48:09,505 INFO L225 Difference]: With dead ends: 1741 [2021-12-18 19:48:09,505 INFO L226 Difference]: Without dead ends: 1741 [2021-12-18 19:48:09,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=2796, Invalid=8334, Unknown=0, NotChecked=0, Total=11130 [2021-12-18 19:48:09,509 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2447 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2447 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:48:09,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2447 Valid, 488 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 997 Invalid, 0 Unknown, 86 Unchecked, 6.3s Time] [2021-12-18 19:48:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-12-18 19:48:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1542. [2021-12-18 19:48:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1540 states have (on average 1.1603896103896103) internal successors, (1787), 1541 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1787 transitions. [2021-12-18 19:48:09,530 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1787 transitions. Word has length 82 [2021-12-18 19:48:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:48:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 1787 transitions. [2021-12-18 19:48:09,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1787 transitions. [2021-12-18 19:48:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-18 19:48:09,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:48:09,541 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:48:09,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-12-18 19:48:09,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:48:09,747 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:48:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:48:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 98760736, now seen corresponding path program 7 times [2021-12-18 19:48:09,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:48:09,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270385336] [2021-12-18 19:48:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:48:09,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:48:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:48:09,749 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:48:09,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-18 19:48:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:48:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:48:09,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:48:10,049 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 8 treesize of output 7 [2021-12-18 19:48:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 55 proven. 246 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:48:12,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:48:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 112 proven. 189 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:48:17,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:48:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270385336] [2021-12-18 19:48:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270385336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:48:17,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:48:17,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-12-18 19:48:17,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686204914] [2021-12-18 19:48:17,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:48:17,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:48:17,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:48:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:48:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:48:17,399 INFO L87 Difference]: Start difference. First operand 1542 states and 1787 transitions. Second operand has 31 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:48:27,826 INFO L93 Difference]: Finished difference Result 3921 states and 4636 transitions. [2021-12-18 19:48:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:48:27,826 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-18 19:48:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:48:27,834 INFO L225 Difference]: With dead ends: 3921 [2021-12-18 19:48:27,834 INFO L226 Difference]: Without dead ends: 3913 [2021-12-18 19:48:27,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1039, Invalid=3791, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:48:27,835 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 425 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:48:27,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 404 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 511 Invalid, 0 Unknown, 140 Unchecked, 1.5s Time] [2021-12-18 19:48:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-12-18 19:48:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3500. [2021-12-18 19:48:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 3498 states have (on average 1.2032590051457976) internal successors, (4209), 3499 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4209 transitions. [2021-12-18 19:48:27,862 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4209 transitions. Word has length 95 [2021-12-18 19:48:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:48:27,862 INFO L470 AbstractCegarLoop]: Abstraction has 3500 states and 4209 transitions. [2021-12-18 19:48:27,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4209 transitions. [2021-12-18 19:48:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:48:27,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:48:27,865 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:48:27,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-18 19:48:28,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:48:28,074 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:48:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:48:28,075 INFO L85 PathProgramCache]: Analyzing trace with hash 464474487, now seen corresponding path program 3 times [2021-12-18 19:48:28,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:48:28,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804893926] [2021-12-18 19:48:28,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:48:28,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:48:28,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:48:28,081 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:48:28,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-18 19:48:28,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:48:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:48:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:48:28,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:48:28,369 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 8 treesize of output 7 [2021-12-18 19:48:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 214 proven. 28 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-18 19:48:31,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:48:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 36 proven. 206 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-18 19:48:42,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:48:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804893926] [2021-12-18 19:48:42,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804893926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:48:42,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:48:42,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-12-18 19:48:42,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014592664] [2021-12-18 19:48:42,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:48:42,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:48:42,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:48:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:48:42,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:48:42,287 INFO L87 Difference]: Start difference. First operand 3500 states and 4209 transitions. Second operand has 25 states, 24 states have (on average 4.5) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:48:42,727 INFO L93 Difference]: Finished difference Result 5396 states and 6674 transitions. [2021-12-18 19:48:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:48:42,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.5) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 19:48:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:48:42,733 INFO L225 Difference]: With dead ends: 5396 [2021-12-18 19:48:42,733 INFO L226 Difference]: Without dead ends: 5392 [2021-12-18 19:48:42,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:48:42,734 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:48:42,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2021-12-18 19:48:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-12-18 19:48:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4001. [2021-12-18 19:48:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 3999 states have (on average 1.2248062015503876) internal successors, (4898), 4000 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4898 transitions. [2021-12-18 19:48:42,772 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4898 transitions. Word has length 101 [2021-12-18 19:48:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:48:42,772 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 4898 transitions. [2021-12-18 19:48:42,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.5) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4898 transitions. [2021-12-18 19:48:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:48:42,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:48:42,776 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:48:42,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-12-18 19:48:42,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:48:42,986 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:48:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:48:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2005422743, now seen corresponding path program 4 times [2021-12-18 19:48:42,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:48:42,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645753874] [2021-12-18 19:48:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:48:42,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:48:42,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:48:42,988 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:48:42,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-18 19:48:43,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:48:43,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:48:43,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:48:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:48:43,226 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 8 treesize of output 7 [2021-12-18 19:48:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 55 proven. 246 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:48:45,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:48:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 112 proven. 189 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:48:49,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:48:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645753874] [2021-12-18 19:48:49,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645753874] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:48:49,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:48:49,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-12-18 19:48:49,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622848333] [2021-12-18 19:48:49,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:48:49,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:48:49,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:48:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:48:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:48:49,264 INFO L87 Difference]: Start difference. First operand 4001 states and 4898 transitions. Second operand has 31 states, 30 states have (on average 4.333333333333333) internal successors, (130), 31 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:48:52,718 INFO L93 Difference]: Finished difference Result 6013 states and 7352 transitions. [2021-12-18 19:48:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 19:48:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.333333333333333) internal successors, (130), 31 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 19:48:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:48:52,726 INFO L225 Difference]: With dead ends: 6013 [2021-12-18 19:48:52,726 INFO L226 Difference]: Without dead ends: 6005 [2021-12-18 19:48:52,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=619, Invalid=2243, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:48:52,727 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 755 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:48:52,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 398 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 601 Invalid, 0 Unknown, 86 Unchecked, 1.2s Time] [2021-12-18 19:48:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2021-12-18 19:48:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 2239. [2021-12-18 19:48:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2237 states have (on average 1.1627179257934734) internal successors, (2601), 2238 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 2601 transitions. [2021-12-18 19:48:52,762 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 2601 transitions. Word has length 101 [2021-12-18 19:48:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:48:52,762 INFO L470 AbstractCegarLoop]: Abstraction has 2239 states and 2601 transitions. [2021-12-18 19:48:52,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.333333333333333) internal successors, (130), 31 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 2601 transitions. [2021-12-18 19:48:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:48:52,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:48:52,764 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:48:52,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-12-18 19:48:52,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:48:52,968 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:48:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:48:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 126493481, now seen corresponding path program 5 times [2021-12-18 19:48:52,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:48:52,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700452984] [2021-12-18 19:48:52,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:48:52,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:48:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:48:52,970 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:48:52,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-18 19:48:53,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 19:48:53,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:48:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:48:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:48:53,631 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 8 treesize of output 7 [2021-12-18 19:48:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 103 proven. 132 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-18 19:48:55,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:48:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 90 proven. 145 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-18 19:48:57,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:48:57,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700452984] [2021-12-18 19:48:57,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700452984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:48:57,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:48:57,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-12-18 19:48:57,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72169642] [2021-12-18 19:48:57,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:48:57,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:48:57,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:48:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:48:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:48:57,706 INFO L87 Difference]: Start difference. First operand 2239 states and 2601 transitions. Second operand has 21 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:48:58,108 INFO L93 Difference]: Finished difference Result 3349 states and 3945 transitions. [2021-12-18 19:48:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:48:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 19:48:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:48:58,119 INFO L225 Difference]: With dead ends: 3349 [2021-12-18 19:48:58,119 INFO L226 Difference]: Without dead ends: 3345 [2021-12-18 19:48:58,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:48:58,121 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:48:58,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 204 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2021-12-18 19:48:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-12-18 19:48:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 3053. [2021-12-18 19:48:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3051 states have (on average 1.1950180268764339) internal successors, (3646), 3052 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 3646 transitions. [2021-12-18 19:48:58,147 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 3646 transitions. Word has length 101 [2021-12-18 19:48:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:48:58,147 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 3646 transitions. [2021-12-18 19:48:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:48:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 3646 transitions. [2021-12-18 19:48:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:48:58,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:48:58,150 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:48:58,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-18 19:48:58,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:48:58,355 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:48:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:48:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash 911855479, now seen corresponding path program 6 times [2021-12-18 19:48:58,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:48:58,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359775845] [2021-12-18 19:48:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:48:58,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:48:58,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:48:58,357 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:48:58,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-18 19:48:58,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:48:58,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:48:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:48:58,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:48:58,815 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 8 treesize of output 7 [2021-12-18 19:49:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 177 proven. 85 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-18 19:49:04,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 113 proven. 149 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-18 19:49:12,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:49:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359775845] [2021-12-18 19:49:12,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359775845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:12,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:49:12,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-12-18 19:49:12,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41766967] [2021-12-18 19:49:12,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:12,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:49:12,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:49:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:49:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:49:12,267 INFO L87 Difference]: Start difference. First operand 3053 states and 3646 transitions. Second operand has 25 states, 24 states have (on average 4.583333333333333) internal successors, (110), 25 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:13,675 INFO L93 Difference]: Finished difference Result 4165 states and 5020 transitions. [2021-12-18 19:49:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:49:13,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.583333333333333) internal successors, (110), 25 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 19:49:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:13,682 INFO L225 Difference]: With dead ends: 4165 [2021-12-18 19:49:13,682 INFO L226 Difference]: Without dead ends: 4150 [2021-12-18 19:49:13,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:49:13,683 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:13,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 253 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2021-12-18 19:49:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-12-18 19:49:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3924. [2021-12-18 19:49:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3922 states have (on average 1.2182559918408975) internal successors, (4778), 3923 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 4778 transitions. [2021-12-18 19:49:13,729 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 4778 transitions. Word has length 101 [2021-12-18 19:49:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:13,730 INFO L470 AbstractCegarLoop]: Abstraction has 3924 states and 4778 transitions. [2021-12-18 19:49:13,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.583333333333333) internal successors, (110), 25 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 4778 transitions. [2021-12-18 19:49:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 19:49:13,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:13,733 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:13,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:13,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:49:13,942 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:49:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1899701184, now seen corresponding path program 7 times [2021-12-18 19:49:13,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:49:13,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267404107] [2021-12-18 19:49:13,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:49:13,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:49:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:49:13,944 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:49:13,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-18 19:49:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:49:14,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:14,203 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 8 treesize of output 7 [2021-12-18 19:49:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 55 proven. 252 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:49:16,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 112 proven. 195 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:49:20,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:49:20,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267404107] [2021-12-18 19:49:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267404107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:20,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:49:20,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-12-18 19:49:20,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055913208] [2021-12-18 19:49:20,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:20,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:49:20,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:49:20,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:49:20,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:49:20,641 INFO L87 Difference]: Start difference. First operand 3924 states and 4778 transitions. Second operand has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 31 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:26,480 INFO L93 Difference]: Finished difference Result 7571 states and 9391 transitions. [2021-12-18 19:49:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:49:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 31 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-18 19:49:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:26,489 INFO L225 Difference]: With dead ends: 7571 [2021-12-18 19:49:26,489 INFO L226 Difference]: Without dead ends: 7563 [2021-12-18 19:49:26,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=746, Invalid=2794, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 19:49:26,499 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 573 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:26,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 501 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 696 Invalid, 0 Unknown, 157 Unchecked, 2.2s Time] [2021-12-18 19:49:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7563 states. [2021-12-18 19:49:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7563 to 6794. [2021-12-18 19:49:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6794 states, 6792 states have (on average 1.2555948174322733) internal successors, (8528), 6793 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6794 states to 6794 states and 8528 transitions. [2021-12-18 19:49:26,631 INFO L78 Accepts]: Start accepts. Automaton has 6794 states and 8528 transitions. Word has length 107 [2021-12-18 19:49:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:26,632 INFO L470 AbstractCegarLoop]: Abstraction has 6794 states and 8528 transitions. [2021-12-18 19:49:26,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 31 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6794 states and 8528 transitions. [2021-12-18 19:49:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 19:49:26,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:26,636 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:26,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:26,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:49:26,837 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:49:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1114339186, now seen corresponding path program 8 times [2021-12-18 19:49:26,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:49:26,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611251523] [2021-12-18 19:49:26,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:49:26,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:49:26,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:49:26,838 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:49:26,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-18 19:49:27,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:49:27,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:27,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:49:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:27,069 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 8 treesize of output 7 [2021-12-18 19:49:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 55 proven. 252 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:49:29,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 112 proven. 195 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-18 19:49:33,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:49:33,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611251523] [2021-12-18 19:49:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611251523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:33,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:49:33,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-12-18 19:49:33,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800682976] [2021-12-18 19:49:33,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:33,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:49:33,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:49:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:49:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:49:33,586 INFO L87 Difference]: Start difference. First operand 6794 states and 8528 transitions. Second operand has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 31 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15