./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test13_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/ldv-memsafety/memleaks_test13_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 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:08:36,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:08:36,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:08:36,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:08:36,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:08:36,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:08:36,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:08:36,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:08:36,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:08:36,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:08:36,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:08:36,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:08:36,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:08:36,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:08:36,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:08:36,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:08:36,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:08:36,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:08:36,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:08:36,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:08:36,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:08:36,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:08:36,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:08:36,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:08:36,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:08:36,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:08:36,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:08:36,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:08:36,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:08:36,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:08:36,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:08:36,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:08:36,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:08:36,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:08:36,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:08:36,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:08:36,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:08:36,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:08:36,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:08:36,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:08:36,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:08:36,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:08:36,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:08:36,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:08:36,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:08:36,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:08:36,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:08:36,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:08:36,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:08:36,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:08:36,248 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:08:36,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:08:36,249 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:08:36,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:08:36,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:08:36,250 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:08:36,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:08:36,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:08:36,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:08:36,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:08:36,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:08:36,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:08:36,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:08:36,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:08:36,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:08:36,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:08:36,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:08:36,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2021-12-18 21:08:36,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:08:36,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:08:36,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:08:36,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:08:36,484 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:08:36,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-12-18 21:08:36,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1802650c8/952be742c2c848db879a60d444733659/FLAGcb01cc686 [2021-12-18 21:08:36,903 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:08:36,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-12-18 21:08:36,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1802650c8/952be742c2c848db879a60d444733659/FLAGcb01cc686 [2021-12-18 21:08:37,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1802650c8/952be742c2c848db879a60d444733659 [2021-12-18 21:08:37,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:08:37,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:08:37,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:08:37,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:08:37,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:08:37,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:08:37" (1/1) ... [2021-12-18 21:08:37,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34768456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:37, skipping insertion in model container [2021-12-18 21:08:37,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:08:37" (1/1) ... [2021-12-18 21:08:37,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:08:37,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:08:37,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:08:37,735 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-18 21:08:37,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@244ad231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:37, skipping insertion in model container [2021-12-18 21:08:37,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:08:37,737 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:08:37,739 INFO L158 Benchmark]: Toolchain (without parser) took 442.32ms. Allocated memory was 96.5MB in the beginning and 146.8MB in the end (delta: 50.3MB). Free memory was 66.4MB in the beginning and 118.3MB in the end (delta: -51.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:08:37,740 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory was 56.1MB in the beginning and 56.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:08:37,741 INFO L158 Benchmark]: CACSL2BoogieTranslator took 438.57ms. Allocated memory was 96.5MB in the beginning and 146.8MB in the end (delta: 50.3MB). Free memory was 66.1MB in the beginning and 118.3MB in the end (delta: -52.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:08:37,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory was 56.1MB in the beginning and 56.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 438.57ms. Allocated memory was 96.5MB in the beginning and 146.8MB in the end (delta: 50.3MB). Free memory was 66.1MB in the beginning and 118.3MB in the end (delta: -52.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test13_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 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:08:39,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:08:39,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:08:39,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:08:39,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:08:39,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:08:39,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:08:39,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:08:39,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:08:39,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:08:39,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:08:39,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:08:39,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:08:39,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:08:39,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:08:39,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:08:39,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:08:39,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:08:39,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:08:39,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:08:39,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:08:39,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:08:39,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:08:39,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:08:39,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:08:39,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:08:39,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:08:39,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:08:39,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:08:39,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:08:39,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:08:39,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:08:39,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:08:39,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:08:39,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:08:39,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:08:39,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:08:39,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:08:39,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:08:39,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:08:39,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:08:39,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:08:39,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:08:39,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:08:39,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:08:39,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:08:39,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:08:39,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:08:39,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:08:39,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:08:39,571 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:08:39,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:08:39,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:08:39,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:08:39,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:08:39,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:08:39,573 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:08:39,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:08:39,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:08:39,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:08:39,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:08:39,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:08:39,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:08:39,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:08:39,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:08:39,579 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:08:39,580 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:08:39,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:08:39,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:08:39,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2021-12-18 21:08:39,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:08:39,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:08:39,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:08:39,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:08:39,898 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:08:39,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-12-18 21:08:39,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3153cd033/068149997f1543c89d2cc7ac847e309b/FLAGfbbbe1425 [2021-12-18 21:08:40,427 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:08:40,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-12-18 21:08:40,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3153cd033/068149997f1543c89d2cc7ac847e309b/FLAGfbbbe1425 [2021-12-18 21:08:40,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3153cd033/068149997f1543c89d2cc7ac847e309b [2021-12-18 21:08:40,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:08:40,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:08:40,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:08:40,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:08:40,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:08:40,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:08:40" (1/1) ... [2021-12-18 21:08:40,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da18a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:40, skipping insertion in model container [2021-12-18 21:08:40,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:08:40" (1/1) ... [2021-12-18 21:08:40,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:08:41,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:08:41,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:08:41,262 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:08:41,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:08:41,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:08:41,323 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:08:41,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:08:41,426 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:08:41,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41 WrapperNode [2021-12-18 21:08:41,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:08:41,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:08:41,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:08:41,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:08:41,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,485 INFO L137 Inliner]: procedures = 167, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 53 [2021-12-18 21:08:41,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:08:41,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:08:41,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:08:41,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:08:41,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:08:41,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:08:41,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:08:41,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:08:41,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (1/1) ... [2021-12-18 21:08:41,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:08:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:08:41,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 21:08:41,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 21:08:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-18 21:08:41,602 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-18 21:08:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-18 21:08:41,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-18 21:08:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:08:41,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:08:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-12-18 21:08:41,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-12-18 21:08:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:08:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:08:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:08:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:08:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:08:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-12-18 21:08:41,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-12-18 21:08:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:08:41,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:08:41,712 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:08:41,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:08:41,983 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:08:41,996 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:08:41,997 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 21:08:41,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:08:41 BoogieIcfgContainer [2021-12-18 21:08:41,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:08:41,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:08:41,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:08:42,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:08:42,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:08:40" (1/3) ... [2021-12-18 21:08:42,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b037bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:08:42, skipping insertion in model container [2021-12-18 21:08:42,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:08:41" (2/3) ... [2021-12-18 21:08:42,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b037bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:08:42, skipping insertion in model container [2021-12-18 21:08:42,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:08:41" (3/3) ... [2021-12-18 21:08:42,006 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test13_2.i [2021-12-18 21:08:42,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:08:42,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-12-18 21:08:42,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:08:42,056 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 21:08:42,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-12-18 21:08:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:08:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:08:42,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:42,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:42,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:42,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1285123929, now seen corresponding path program 1 times [2021-12-18 21:08:42,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:42,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994772253] [2021-12-18 21:08:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:42,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:42,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:42,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:42,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:08:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:08:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:42,325 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:08:42,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 21:08:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:42,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:42,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994772253] [2021-12-18 21:08:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994772253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:42,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:42,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:08:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092665413] [2021-12-18 21:08:42,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:42,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:08:42,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:08:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:08:42,399 INFO L87 Difference]: Start difference. First operand has 82 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:42,673 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-12-18 21:08:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:08:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:08:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:42,680 INFO L225 Difference]: With dead ends: 82 [2021-12-18 21:08:42,681 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 21:08:42,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:08:42,683 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 170 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:42,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 104 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2021-12-18 21:08:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 21:08:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-12-18 21:08:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 68 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:08:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-18 21:08:42,705 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 12 [2021-12-18 21:08:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-18 21:08:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-18 21:08:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:08:42,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:42,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:42,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:42,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:42,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1285123928, now seen corresponding path program 1 times [2021-12-18 21:08:42,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:42,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529761461] [2021-12-18 21:08:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:42,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:42,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:42,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:08:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:43,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:08:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:08:45,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:08:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:45,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:45,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529761461] [2021-12-18 21:08:45,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529761461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:45,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:45,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:08:45,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363502706] [2021-12-18 21:08:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:45,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:08:45,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:45,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:08:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2021-12-18 21:08:45,296 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:49,730 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2021-12-18 21:08:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:08:49,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:08:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:49,732 INFO L225 Difference]: With dead ends: 85 [2021-12-18 21:08:49,732 INFO L226 Difference]: Without dead ends: 85 [2021-12-18 21:08:49,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=55, Invalid=124, Unknown=3, NotChecked=0, Total=182 [2021-12-18 21:08:49,733 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 124 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:49,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 107 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2021-12-18 21:08:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-18 21:08:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-12-18 21:08:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:08:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-12-18 21:08:49,746 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 12 [2021-12-18 21:08:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:49,747 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-12-18 21:08:49,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-12-18 21:08:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:08:49,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:49,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:49,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-18 21:08:49,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:49,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __ldv_list_addErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash 211575775, now seen corresponding path program 1 times [2021-12-18 21:08:49,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811037321] [2021-12-18 21:08:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:49,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:49,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:49,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:08:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:50,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:08:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:50,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:50,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:50,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:50,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811037321] [2021-12-18 21:08:50,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811037321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:50,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:50,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:08:50,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451211212] [2021-12-18 21:08:50,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:50,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:08:50,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:08:50,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:08:50,154 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:50,479 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2021-12-18 21:08:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:08:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 21:08:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:50,481 INFO L225 Difference]: With dead ends: 109 [2021-12-18 21:08:50,481 INFO L226 Difference]: Without dead ends: 109 [2021-12-18 21:08:50,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:08:50,482 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 64 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:50,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 314 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:08:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-18 21:08:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2021-12-18 21:08:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 65 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:08:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-18 21:08:50,488 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 15 [2021-12-18 21:08:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:50,489 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-18 21:08:50,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-18 21:08:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:08:50,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:50,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:50,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-18 21:08:50,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:50,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash 211575776, now seen corresponding path program 1 times [2021-12-18 21:08:50,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:50,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766373912] [2021-12-18 21:08:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:50,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:50,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:50,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:08:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 21:08:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:08:53,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:08:53,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:53,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:53,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:53,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766373912] [2021-12-18 21:08:53,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766373912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:53,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:53,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:08:53,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125559438] [2021-12-18 21:08:53,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:08:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:08:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2021-12-18 21:08:53,309 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:58,305 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2021-12-18 21:08:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:08:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 21:08:58,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:58,307 INFO L225 Difference]: With dead ends: 112 [2021-12-18 21:08:58,307 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 21:08:58,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=95, Invalid=322, Unknown=3, NotChecked=0, Total=420 [2021-12-18 21:08:58,308 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:58,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 266 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 379 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2021-12-18 21:08:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 21:08:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2021-12-18 21:08:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:08:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-18 21:08:58,316 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 15 [2021-12-18 21:08:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:58,317 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-18 21:08:58,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-18 21:08:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 21:08:58,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:58,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:58,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:58,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:58,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:58,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1183663415, now seen corresponding path program 1 times [2021-12-18 21:08:58,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:58,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786467220] [2021-12-18 21:08:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:58,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:58,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:58,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:08:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:08:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:58,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:58,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:58,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786467220] [2021-12-18 21:08:58,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786467220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:58,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:58,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:08:58,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148878566] [2021-12-18 21:08:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:58,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:08:58,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:08:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:08:58,635 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:58,651 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-12-18 21:08:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:08:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 21:08:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:58,656 INFO L225 Difference]: With dead ends: 98 [2021-12-18 21:08:58,657 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 21:08:58,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:08:58,665 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 18 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:58,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 359 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:08:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 21:08:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-12-18 21:08:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 67 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:08:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-18 21:08:58,676 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 13 [2021-12-18 21:08:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:58,677 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-18 21:08:58,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-18 21:08:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 21:08:58,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:58,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:58,686 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 21:08:58,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:58,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1303849418, now seen corresponding path program 1 times [2021-12-18 21:08:58,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207770721] [2021-12-18 21:08:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:58,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:58,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 21:08:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:08:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:59,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:59,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:59,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:59,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:59,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207770721] [2021-12-18 21:08:59,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207770721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:59,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:59,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:08:59,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387054467] [2021-12-18 21:08:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:08:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:08:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:08:59,282 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:08:59,569 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-12-18 21:08:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:08:59,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 21:08:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:08:59,571 INFO L225 Difference]: With dead ends: 103 [2021-12-18 21:08:59,571 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 21:08:59,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:08:59,572 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 35 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:08:59,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 220 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:08:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 21:08:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2021-12-18 21:08:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.52) internal successors, (76), 72 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:08:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-12-18 21:08:59,582 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 13 [2021-12-18 21:08:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:08:59,582 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-12-18 21:08:59,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:08:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-12-18 21:08:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 21:08:59,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:08:59,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:08:59,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:08:59,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:08:59,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:08:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:08:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1303849417, now seen corresponding path program 1 times [2021-12-18 21:08:59,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:08:59,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316962516] [2021-12-18 21:08:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:08:59,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:08:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:08:59,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:08:59,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:08:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:08:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:08:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:08:59,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:08:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:08:59,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:08:59,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:08:59,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316962516] [2021-12-18 21:08:59,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316962516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:08:59,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:08:59,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:08:59,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772556057] [2021-12-18 21:08:59,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:08:59,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:08:59,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:08:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:08:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:08:59,990 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:00,253 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-12-18 21:09:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:09:00,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 21:09:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:00,254 INFO L225 Difference]: With dead ends: 98 [2021-12-18 21:09:00,254 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 21:09:00,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:09:00,255 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 38 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:00,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 170 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:09:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 21:09:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-12-18 21:09:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.5) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:09:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-12-18 21:09:00,259 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 13 [2021-12-18 21:09:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:00,259 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-12-18 21:09:00,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-12-18 21:09:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:09:00,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:00,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:00,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:00,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:00,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2031085508, now seen corresponding path program 1 times [2021-12-18 21:09:00,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:00,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889580756] [2021-12-18 21:09:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:00,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:00,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:00,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:09:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:00,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:09:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:09:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:00,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:00,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889580756] [2021-12-18 21:09:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889580756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:00,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:00,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:09:00,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797203627] [2021-12-18 21:09:00,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:00,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:09:00,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:09:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:09:00,607 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:00,940 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-12-18 21:09:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:09:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:09:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:00,941 INFO L225 Difference]: With dead ends: 120 [2021-12-18 21:09:00,941 INFO L226 Difference]: Without dead ends: 120 [2021-12-18 21:09:00,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:09:00,942 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:00,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 355 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:09:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-18 21:09:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2021-12-18 21:09:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 82 states have internal predecessors, (88), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:09:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2021-12-18 21:09:00,946 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 16 [2021-12-18 21:09:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:00,946 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2021-12-18 21:09:00,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2021-12-18 21:09:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:09:00,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:00,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:00,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-18 21:09:01,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:01,154 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __ldv_list_addErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:01,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2031085507, now seen corresponding path program 1 times [2021-12-18 21:09:01,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:01,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736846104] [2021-12-18 21:09:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:01,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:01,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:01,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:09:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:09:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:01,226 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 6 treesize of output 5 [2021-12-18 21:09:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:01,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:01,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736846104] [2021-12-18 21:09:01,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736846104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:01,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:01,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:09:01,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949894662] [2021-12-18 21:09:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:01,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:09:01,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:09:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:09:01,359 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:01,776 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-18 21:09:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:09:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:09:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:01,777 INFO L225 Difference]: With dead ends: 118 [2021-12-18 21:09:01,778 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 21:09:01,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:09:01,778 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 41 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:01,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 451 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:09:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 21:09:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-12-18 21:09:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 82 states have internal predecessors, (86), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:09:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-12-18 21:09:01,784 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 16 [2021-12-18 21:09:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:01,784 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-12-18 21:09:01,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-12-18 21:09:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:09:01,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:01,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:01,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:01,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:01,993 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __ldv_list_addErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:01,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1902002789, now seen corresponding path program 1 times [2021-12-18 21:09:01,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:01,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355605414] [2021-12-18 21:09:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:01,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:01,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:02,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:02,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:09:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:09:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:02,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:02,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:02,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355605414] [2021-12-18 21:09:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355605414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:02,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:02,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:09:02,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457125345] [2021-12-18 21:09:02,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:02,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:09:02,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:09:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:09:02,096 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:02,106 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-12-18 21:09:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:09:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 21:09:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:02,107 INFO L225 Difference]: With dead ends: 85 [2021-12-18 21:09:02,108 INFO L226 Difference]: Without dead ends: 85 [2021-12-18 21:09:02,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:09:02,108 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:02,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 286 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:09:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-18 21:09:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-12-18 21:09:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.4) internal successors, (70), 68 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:09:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-12-18 21:09:02,112 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 16 [2021-12-18 21:09:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:02,112 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-12-18 21:09:02,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-12-18 21:09:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:09:02,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:02,113 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 21:09:02,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:02,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:02,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr6REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1958018817, now seen corresponding path program 1 times [2021-12-18 21:09:02,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:02,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184994275] [2021-12-18 21:09:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:02,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:02,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:02,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:09:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:02,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:09:02,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:02,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:02,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:02,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184994275] [2021-12-18 21:09:02,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184994275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:02,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:02,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:09:02,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328629395] [2021-12-18 21:09:02,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:09:02,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:09:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:09:02,432 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:02,533 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-18 21:09:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:09:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-18 21:09:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:02,534 INFO L225 Difference]: With dead ends: 79 [2021-12-18 21:09:02,534 INFO L226 Difference]: Without dead ends: 79 [2021-12-18 21:09:02,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:09:02,535 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 12 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:02,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 179 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:09:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-18 21:09:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-12-18 21:09:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.38) internal successors, (69), 67 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:09:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-18 21:09:02,542 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 18 [2021-12-18 21:09:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:02,542 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-18 21:09:02,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-18 21:09:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:09:02,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:02,543 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 21:09:02,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-18 21:09:02,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:02,743 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr7REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1958018816, now seen corresponding path program 1 times [2021-12-18 21:09:02,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:02,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797544475] [2021-12-18 21:09:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:02,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:02,753 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:02,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:09:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:09:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:02,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:02,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797544475] [2021-12-18 21:09:02,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797544475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:02,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:02,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:09:02,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011878718] [2021-12-18 21:09:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:02,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:09:02,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:09:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:09:02,919 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:03,237 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-12-18 21:09:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:09:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-18 21:09:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:03,238 INFO L225 Difference]: With dead ends: 78 [2021-12-18 21:09:03,238 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 21:09:03,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:09:03,238 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:03,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 282 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:09:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 21:09:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-18 21:09:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.36) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:09:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-18 21:09:03,241 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 18 [2021-12-18 21:09:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:03,241 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-18 21:09:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-18 21:09:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:09:03,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:03,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:03,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:03,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:03,449 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1449226599, now seen corresponding path program 1 times [2021-12-18 21:09:03,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528029244] [2021-12-18 21:09:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:03,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:03,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:03,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:03,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 21:09:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:03,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:09:03,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:03,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:03,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:03,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528029244] [2021-12-18 21:09:03,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528029244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:03,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:03,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:09:03,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716123234] [2021-12-18 21:09:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:03,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:09:03,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:09:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:09:03,682 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:03,967 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-18 21:09:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:09:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-18 21:09:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:03,969 INFO L225 Difference]: With dead ends: 76 [2021-12-18 21:09:03,970 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 21:09:03,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:09:03,970 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 94 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:03,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 82 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:09:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 21:09:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-18 21:09:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.32) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:09:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-12-18 21:09:03,973 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 19 [2021-12-18 21:09:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:03,973 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-12-18 21:09:03,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-12-18 21:09:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:09:03,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:03,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:03,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-18 21:09:04,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:04,181 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1449226600, now seen corresponding path program 1 times [2021-12-18 21:09:04,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:04,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991288136] [2021-12-18 21:09:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:04,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:04,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:04,187 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:04,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:09:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 21:09:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:04,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:04,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991288136] [2021-12-18 21:09:04,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991288136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:04,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:04,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:09:04,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750268428] [2021-12-18 21:09:04,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:04,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:09:04,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:09:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:09:04,382 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:04,558 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-12-18 21:09:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:09:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-18 21:09:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:04,559 INFO L225 Difference]: With dead ends: 86 [2021-12-18 21:09:04,559 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 21:09:04,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:09:04,559 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 22 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:04,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 203 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:09:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 21:09:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-12-18 21:09:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.290909090909091) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 21:09:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-18 21:09:04,561 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 19 [2021-12-18 21:09:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:04,561 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-18 21:09:04,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:09:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-18 21:09:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:09:04,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:04,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:04,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:04,763 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash 59862981, now seen corresponding path program 1 times [2021-12-18 21:09:04,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:04,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774967858] [2021-12-18 21:09:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:04,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:04,765 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:09:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:09:04,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:04,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:04,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774967858] [2021-12-18 21:09:04,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774967858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:04,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:04,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:09:04,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604117908] [2021-12-18 21:09:04,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:04,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:09:04,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:09:04,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:09:04,869 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:09:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:04,980 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-12-18 21:09:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:09:04,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-18 21:09:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:04,981 INFO L225 Difference]: With dead ends: 85 [2021-12-18 21:09:04,981 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 21:09:04,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:09:04,983 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:04,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 87 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:09:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 21:09:04,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-18 21:09:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 55 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:09:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-12-18 21:09:04,985 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 24 [2021-12-18 21:09:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:04,985 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-12-18 21:09:04,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:09:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-12-18 21:09:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:09:04,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:04,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:05,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:05,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:05,198 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -929247957, now seen corresponding path program 1 times [2021-12-18 21:09:05,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:05,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219392598] [2021-12-18 21:09:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:05,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:05,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:05,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:09:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:05,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:09:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:05,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:09:05,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:05,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:05,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 21:09:05,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:09:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:05,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:05,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:05,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219392598] [2021-12-18 21:09:05,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219392598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:05,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:05,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 21:09:05,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032690205] [2021-12-18 21:09:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:05,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:09:05,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:09:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:09:05,710 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:05,827 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-12-18 21:09:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:09:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-12-18 21:09:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:05,828 INFO L225 Difference]: With dead ends: 69 [2021-12-18 21:09:05,828 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 21:09:05,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:09:05,829 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:05,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 209 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-12-18 21:09:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 21:09:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-12-18 21:09:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 54 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:09:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-12-18 21:09:05,831 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 27 [2021-12-18 21:09:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:05,831 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-12-18 21:09:05,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-12-18 21:09:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:09:05,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:05,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:05,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:06,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:06,039 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -929247958, now seen corresponding path program 1 times [2021-12-18 21:09:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:06,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881861258] [2021-12-18 21:09:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:06,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:06,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:06,056 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:06,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:09:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:09:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:06,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:09:06,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:06,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:09:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:06,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:06,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881861258] [2021-12-18 21:09:06,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881861258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:06,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:06,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 21:09:06,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353821374] [2021-12-18 21:09:06,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:06,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:09:06,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:09:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:09:06,418 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:06,719 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-12-18 21:09:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:09:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-12-18 21:09:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:06,720 INFO L225 Difference]: With dead ends: 89 [2021-12-18 21:09:06,720 INFO L226 Difference]: Without dead ends: 89 [2021-12-18 21:09:06,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-18 21:09:06,721 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:06,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 290 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 180 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2021-12-18 21:09:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-18 21:09:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-12-18 21:09:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 53 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:09:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-12-18 21:09:06,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 27 [2021-12-18 21:09:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:06,723 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-12-18 21:09:06,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-12-18 21:09:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:09:06,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:06,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:06,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:06,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:06,931 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1379353082, now seen corresponding path program 1 times [2021-12-18 21:09:06,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:06,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409080582] [2021-12-18 21:09:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:06,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:06,933 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:06,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:09:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:09:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:07,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:09:07,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:07,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:09:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:07,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:07,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:07,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409080582] [2021-12-18 21:09:07,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409080582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:07,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:07,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 21:09:07,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019795508] [2021-12-18 21:09:07,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:07,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:09:07,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:09:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:09:07,367 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:07,499 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-12-18 21:09:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:09:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-18 21:09:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:07,500 INFO L225 Difference]: With dead ends: 83 [2021-12-18 21:09:07,500 INFO L226 Difference]: Without dead ends: 83 [2021-12-18 21:09:07,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:09:07,501 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:07,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 212 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2021-12-18 21:09:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-18 21:09:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-12-18 21:09:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.4) internal successors, (70), 63 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-12-18 21:09:07,503 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 32 [2021-12-18 21:09:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:07,503 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-12-18 21:09:07,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-12-18 21:09:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:09:07,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:07,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:07,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:07,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:07,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1379353083, now seen corresponding path program 1 times [2021-12-18 21:09:07,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385716244] [2021-12-18 21:09:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:07,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:07,716 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:07,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 21:09:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 21:09:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:07,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:09:08,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:08,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:08,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 21:09:08,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:09:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:08,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:08,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385716244] [2021-12-18 21:09:08,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385716244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:08,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:08,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 21:09:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355180007] [2021-12-18 21:09:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:08,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:09:08,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:09:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:09:08,338 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:08,554 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-18 21:09:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:09:08,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-18 21:09:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:08,555 INFO L225 Difference]: With dead ends: 81 [2021-12-18 21:09:08,555 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 21:09:08,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:09:08,556 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:08,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 291 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2021-12-18 21:09:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 21:09:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-12-18 21:09:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.36) internal successors, (68), 63 states have internal predecessors, (68), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-12-18 21:09:08,558 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 32 [2021-12-18 21:09:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:08,558 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-12-18 21:09:08,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-12-18 21:09:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:09:08,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:08,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:08,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:08,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:08,762 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -193116151, now seen corresponding path program 1 times [2021-12-18 21:09:08,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838095901] [2021-12-18 21:09:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:08,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:08,764 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:08,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 21:09:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:09:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:09,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:09,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:09:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:09,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:09,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838095901] [2021-12-18 21:09:09,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838095901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:09,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:09,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 21:09:09,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338865476] [2021-12-18 21:09:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:09,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:09:09,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:09:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:09:09,287 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:09,647 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-12-18 21:09:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:09:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-12-18 21:09:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:09,648 INFO L225 Difference]: With dead ends: 78 [2021-12-18 21:09:09,648 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 21:09:09,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:09:09,648 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 91 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:09,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 383 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:09:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 21:09:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-18 21:09:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.34) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-12-18 21:09:09,650 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 33 [2021-12-18 21:09:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:09,651 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-12-18 21:09:09,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-12-18 21:09:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 21:09:09,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:09,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:09,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:09,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:09,859 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr4REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1939380463, now seen corresponding path program 1 times [2021-12-18 21:09:09,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:09,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938530388] [2021-12-18 21:09:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:09,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:09,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:09,861 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:09,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 21:09:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 21:09:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:10,073 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:10,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:10,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:10,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:10,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:10,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:10,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:10,508 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:10,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:09:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-18 21:09:11,073 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 21:09:11,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 21:09:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:11,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:11,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938530388] [2021-12-18 21:09:11,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938530388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:11,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:11,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-18 21:09:11,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709830923] [2021-12-18 21:09:11,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:11,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:09:11,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:09:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:09:11,140 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:11,862 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-12-18 21:09:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 21:09:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-18 21:09:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:11,863 INFO L225 Difference]: With dead ends: 78 [2021-12-18 21:09:11,863 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 21:09:11,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:09:11,864 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:11,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 491 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 357 Invalid, 0 Unknown, 288 Unchecked, 0.4s Time] [2021-12-18 21:09:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 21:09:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-18 21:09:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.32) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-18 21:09:11,866 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 35 [2021-12-18 21:09:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:11,866 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-18 21:09:11,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-18 21:09:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 21:09:11,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:11,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:11,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:12,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:12,076 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr5REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1939380462, now seen corresponding path program 1 times [2021-12-18 21:09:12,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102183545] [2021-12-18 21:09:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:12,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:12,078 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:12,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 21:09:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 21:09:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:12,363 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:12,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:12,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:12,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:12,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:12,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:12,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:12,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:12,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:12,925 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:12,960 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:12,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:13,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-12-18 21:09:13,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2021-12-18 21:09:14,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 35 [2021-12-18 21:09:14,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:14,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 21:09:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:14,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:14,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102183545] [2021-12-18 21:09:14,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102183545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:14,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:14,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-18 21:09:14,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546997543] [2021-12-18 21:09:14,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:14,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:09:14,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:14,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:09:14,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:09:14,177 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:16,401 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-12-18 21:09:16,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 21:09:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-18 21:09:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:16,404 INFO L225 Difference]: With dead ends: 77 [2021-12-18 21:09:16,404 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 21:09:16,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 21:09:16,405 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 95 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:16,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 406 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 21:09:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 21:09:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-18 21:09:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.3) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-18 21:09:16,407 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 35 [2021-12-18 21:09:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:16,407 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-18 21:09:16,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-18 21:09:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:09:16,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:16,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:16,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:16,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:16,616 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_list_delErr6REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash 8747840, now seen corresponding path program 1 times [2021-12-18 21:09:16,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333874087] [2021-12-18 21:09:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:16,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:16,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:16,620 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:16,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 21:09:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 21:09:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:16,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:09:18,808 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-18 21:09:18,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-12-18 21:09:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:19,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-18 21:09:19,260 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 21:09:19,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 21:09:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:19,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:19,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:19,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333874087] [2021-12-18 21:09:19,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333874087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:19,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:19,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-18 21:09:19,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371869139] [2021-12-18 21:09:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:19,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:09:19,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:09:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:09:19,331 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:20,044 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-12-18 21:09:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:09:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-18 21:09:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:20,045 INFO L225 Difference]: With dead ends: 76 [2021-12-18 21:09:20,045 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 21:09:20,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 21:09:20,046 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:20,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 226 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2021-12-18 21:09:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 21:09:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-12-18 21:09:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.28) internal successors, (64), 63 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-18 21:09:20,047 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 36 [2021-12-18 21:09:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:20,047 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-18 21:09:20,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-18 21:09:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:09:20,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:20,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:20,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:20,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:20,248 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr7REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash 8747841, now seen corresponding path program 1 times [2021-12-18 21:09:20,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:20,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239801437] [2021-12-18 21:09:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:20,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:20,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:20,250 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:20,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:09:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:20,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 21:09:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:20,472 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:20,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:20,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:09:20,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 21:09:22,546 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-18 21:09:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:23,359 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-18 21:09:23,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-18 21:09:24,299 INFO L354 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2021-12-18 21:09:24,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 47 [2021-12-18 21:09:24,309 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:09:24,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 21:09:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:24,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:24,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:24,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239801437] [2021-12-18 21:09:24,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239801437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:24,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:24,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-18 21:09:24,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745511692] [2021-12-18 21:09:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:24,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:09:24,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:09:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:09:24,400 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:25,657 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-12-18 21:09:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:09:25,657 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-18 21:09:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:25,658 INFO L225 Difference]: With dead ends: 75 [2021-12-18 21:09:25,658 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 21:09:25,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 21:09:25,658 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:25,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 495 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 362 Invalid, 0 Unknown, 200 Unchecked, 0.6s Time] [2021-12-18 21:09:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 21:09:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-18 21:09:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.26) internal successors, (63), 63 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-12-18 21:09:25,660 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 36 [2021-12-18 21:09:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-12-18 21:09:25,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:09:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-12-18 21:09:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:09:25,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:25,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:25,670 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 21:09:25,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:25,867 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash -555084404, now seen corresponding path program 1 times [2021-12-18 21:09:25,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781582538] [2021-12-18 21:09:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:25,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:25,869 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:25,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 21:09:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:09:25,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-18 21:09:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:26,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:26,098 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:26,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781582538] [2021-12-18 21:09:26,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781582538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:26,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:26,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:09:26,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369892835] [2021-12-18 21:09:26,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:26,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:09:26,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:09:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:09:26,099 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:09:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:26,430 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-12-18 21:09:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:09:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-12-18 21:09:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:26,431 INFO L225 Difference]: With dead ends: 78 [2021-12-18 21:09:26,431 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 21:09:26,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:09:26,431 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:26,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 229 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:09:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 21:09:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-12-18 21:09:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-18 21:09:26,433 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 41 [2021-12-18 21:09:26,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:26,433 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-18 21:09:26,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:09:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-18 21:09:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 21:09:26,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:26,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:26,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:26,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:26,634 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:26,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:26,634 INFO L85 PathProgramCache]: Analyzing trace with hash -555084403, now seen corresponding path program 1 times [2021-12-18 21:09:26,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:26,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100536843] [2021-12-18 21:09:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:26,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:26,636 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:26,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 21:09:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 21:09:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:26,972 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:09:26,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:09:26,989 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:26,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:27,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:27,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:27,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:27,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:27,515 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:27,557 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:27,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:27,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:09:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:09:28,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:28,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-18 21:09:28,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-18 21:09:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:28,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:28,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100536843] [2021-12-18 21:09:28,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100536843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:28,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:28,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-18 21:09:28,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293790992] [2021-12-18 21:09:28,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:28,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:09:28,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:09:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:09:28,265 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:09:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:29,885 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-12-18 21:09:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 21:09:29,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2021-12-18 21:09:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:29,887 INFO L225 Difference]: With dead ends: 78 [2021-12-18 21:09:29,887 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 21:09:29,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 21:09:29,887 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 135 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:29,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 303 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 710 Invalid, 0 Unknown, 79 Unchecked, 0.9s Time] [2021-12-18 21:09:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 21:09:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-12-18 21:09:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.25) internal successors, (65), 64 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:09:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-12-18 21:09:29,889 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 41 [2021-12-18 21:09:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:29,889 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-12-18 21:09:29,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:09:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-12-18 21:09:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:09:29,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:29,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:29,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:30,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:30,090 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:30,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1459271833, now seen corresponding path program 1 times [2021-12-18 21:09:30,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:30,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803900224] [2021-12-18 21:09:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:30,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:30,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:30,092 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 21:09:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:30,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 21:09:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-18 21:09:30,436 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 21:09:30,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:30,538 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-12-18 21:09:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 21:09:30,567 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 21:09:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-18 21:09:30,659 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 21:09:30,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803900224] [2021-12-18 21:09:30,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803900224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:09:30,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:09:30,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-12-18 21:09:30,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418933294] [2021-12-18 21:09:30,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:09:30,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 21:09:30,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 21:09:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:09:30,660 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:09:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:31,361 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-12-18 21:09:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:09:31,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-18 21:09:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:31,362 INFO L225 Difference]: With dead ends: 87 [2021-12-18 21:09:31,362 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 21:09:31,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:09:31,363 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 93 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:31,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 315 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:09:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 21:09:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-12-18 21:09:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.25) internal successors, (70), 67 states have internal predecessors, (70), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:09:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-12-18 21:09:31,365 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 46 [2021-12-18 21:09:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:31,365 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-12-18 21:09:31,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:09:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-12-18 21:09:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:09:31,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:31,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:31,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:31,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:31,566 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1459271832, now seen corresponding path program 1 times [2021-12-18 21:09:31,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983087888] [2021-12-18 21:09:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:31,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:31,568 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:31,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 21:09:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 21:09:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:31,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-18 21:09:31,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-12-18 21:09:32,402 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 21:09:32,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:33,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:33,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2021-12-18 21:09:35,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:35,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-12-18 21:09:38,037 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 21:09:38,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983087888] [2021-12-18 21:09:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983087888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:09:38,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:09:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-12-18 21:09:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095445473] [2021-12-18 21:09:38,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:09:38,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 21:09:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 21:09:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:09:38,039 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:09:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:40,873 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-12-18 21:09:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:09:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-12-18 21:09:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:40,875 INFO L225 Difference]: With dead ends: 87 [2021-12-18 21:09:40,876 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 21:09:40,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 21:09:40,876 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 86 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:40,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 429 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 0 Unknown, 165 Unchecked, 1.5s Time] [2021-12-18 21:09:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 21:09:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-12-18 21:09:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 68 states have internal predecessors, (70), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:09:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-18 21:09:40,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 46 [2021-12-18 21:09:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:40,878 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-18 21:09:40,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:09:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-18 21:09:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:09:40,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:40,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:40,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 21:09:41,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:41,079 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2003824700, now seen corresponding path program 1 times [2021-12-18 21:09:41,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:41,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197574106] [2021-12-18 21:09:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:41,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:41,081 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:41,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 21:09:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:09:41,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:41,568 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 21:09:41,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:41,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:41,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197574106] [2021-12-18 21:09:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197574106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:41,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:09:41,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770195848] [2021-12-18 21:09:41,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:41,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:09:41,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:09:41,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:09:41,569 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:09:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:41,887 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-18 21:09:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:09:41,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-12-18 21:09:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:41,888 INFO L225 Difference]: With dead ends: 81 [2021-12-18 21:09:41,888 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 21:09:41,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:09:41,889 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 68 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:41,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 152 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:09:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 21:09:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-18 21:09:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 67 states have internal predecessors, (69), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:09:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-12-18 21:09:41,891 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 47 [2021-12-18 21:09:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:41,891 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-12-18 21:09:41,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:09:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-12-18 21:09:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:09:41,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:41,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:41,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-18 21:09:42,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:42,092 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1989023560, now seen corresponding path program 1 times [2021-12-18 21:09:42,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741972644] [2021-12-18 21:09:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:42,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:42,093 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:42,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 21:09:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:09:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:42,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:42,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:42,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-18 21:09:42,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-18 21:09:42,626 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 21:09:42,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:09:42,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741972644] [2021-12-18 21:09:42,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741972644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:09:42,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:09:42,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 21:09:42,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294335227] [2021-12-18 21:09:42,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:09:42,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 21:09:42,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:09:42,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 21:09:42,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:09:42,627 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:09:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:09:43,291 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-12-18 21:09:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:09:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-12-18 21:09:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:09:43,293 INFO L225 Difference]: With dead ends: 80 [2021-12-18 21:09:43,293 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 21:09:43,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-12-18 21:09:43,294 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:09:43,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 228 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:09:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 21:09:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-18 21:09:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 66 states have internal predecessors, (68), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:09:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-12-18 21:09:43,296 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 48 [2021-12-18 21:09:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:09:43,297 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-12-18 21:09:43,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 21:09:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-12-18 21:09:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 21:09:43,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:09:43,297 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:09:43,306 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 21:09:43,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:09:43,511 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_list_delErr4REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:09:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:09:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash 491835012, now seen corresponding path program 1 times [2021-12-18 21:09:43,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:09:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799225786] [2021-12-18 21:09:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:43,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:09:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:09:43,513 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:09:43,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 21:09:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 21:09:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:43,892 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:09:43,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:09:43,922 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:44,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:44,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:44,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:44,357 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:44,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:44,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:09:44,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-18 21:09:44,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 21:09:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:45,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:46,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:09:46,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799225786] [2021-12-18 21:09:46,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799225786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:09:46,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1950779041] [2021-12-18 21:09:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:09:46,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:09:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:09:46,237 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:09:46,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-18 21:09:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:09:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 21:09:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:09:47,022 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:09:47,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:09:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:47,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:09:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:47,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:09:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:09:47,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:09:47,886 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:47,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:47,929 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:09:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:09:48,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:09:48,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:09:49,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:49,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2021-12-18 21:09:49,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 10 [2021-12-18 21:09:49,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:09:49,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 38 [2021-12-18 21:09:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 15 [2021-12-18 21:09:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:09:49,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:09:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:09:54,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6258 treesize of output 6226 [2021-12-18 21:09:58,057 INFO L354 Elim1Store]: treesize reduction 792, result has 41.5 percent of original size [2021-12-18 21:09:58,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 18 new quantified variables, introduced 136 case distinctions, treesize of input 1830514 treesize of output 1702310 [2021-12-18 21:11:14,980 WARN L227 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 1570 DAG size of output: 1551 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:12:15,977 WARN L227 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 1446 DAG size of output: 1418 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:12:16,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 21:12:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304828507] [2021-12-18 21:12:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:16,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:12:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:12:16,084 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:12:16,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 21:12:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:16,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 21:12:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:16,324 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:12:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:12:16,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 21:12:16,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:12:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:12:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:12:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:12:16,603 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:12:16,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:12:16,643 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:12:16,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:12:16,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:12:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 21:12:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:16,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:12:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2021-12-18 21:12:17,003 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-12-18 21:12:17,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-12-18 21:12:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:17,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:19,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:12:21,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1554 treesize of output 1546 [2021-12-18 21:12:24,694 INFO L354 Elim1Store]: treesize reduction 792, result has 41.5 percent of original size [2021-12-18 21:12:24,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 18 new quantified variables, introduced 136 case distinctions, treesize of input 616036 treesize of output 595208 [2021-12-18 21:12:59,609 WARN L227 SmtUtils]: Spent 34.91s on a formula simplification. DAG size of input: 951 DAG size of output: 948 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:13:28,401 WARN L227 SmtUtils]: Spent 28.79s on a formula simplification. DAG size of input: 903 DAG size of output: 891 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:13:28,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 21:13:28,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:13:28,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-18 21:13:28,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651082353] [2021-12-18 21:13:28,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:28,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 21:13:28,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 21:13:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3778, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 21:13:28,410 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:13:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:31,344 INFO L93 Difference]: Finished difference Result 56 states and 55 transitions. [2021-12-18 21:13:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 21:13:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-12-18 21:13:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:31,345 INFO L225 Difference]: With dead ends: 56 [2021-12-18 21:13:31,345 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 21:13:31,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=390, Invalid=6252, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 21:13:31,347 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:31,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 276 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 775 Invalid, 0 Unknown, 67 Unchecked, 1.1s Time] [2021-12-18 21:13:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 21:13:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 21:13:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:13:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 52 transitions. [2021-12-18 21:13:31,348 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 52 transitions. Word has length 49 [2021-12-18 21:13:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:31,348 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 52 transitions. [2021-12-18 21:13:31,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:13:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 52 transitions. [2021-12-18 21:13:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:13:31,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:31,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:31,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:31,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-18 21:13:31,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:31,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:31,950 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 25 more)] === [2021-12-18 21:13:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash -945482383, now seen corresponding path program 1 times [2021-12-18 21:13:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554674505] [2021-12-18 21:13:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:31,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:31,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:31,952 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:13:31,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-18 21:13:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 21:13:32,188 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 21:13:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 21:13:32,381 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-18 21:13:32,381 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 21:13:32,382 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (28 of 29 remaining) [2021-12-18 21:13:32,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr0REQUIRES_VIOLATION (27 of 29 remaining) [2021-12-18 21:13:32,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr1REQUIRES_VIOLATION (26 of 29 remaining) [2021-12-18 21:13:32,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (25 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (24 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (23 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (22 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (21 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (20 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION (19 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION (18 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION (17 of 29 remaining) [2021-12-18 21:13:32,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION (16 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATION (15 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATION (14 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATION (13 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATION (12 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATION (11 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATION (10 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATION (9 of 29 remaining) [2021-12-18 21:13:32,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATION (8 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATION (7 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATION (6 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATION (5 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATION (4 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATION (3 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATION (2 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATION (1 of 29 remaining) [2021-12-18 21:13:32,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATION (0 of 29 remaining) [2021-12-18 21:13:32,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:32,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:32,589 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:32,591 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 21:13:32,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:13:32 BoogieIcfgContainer [2021-12-18 21:13:32,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 21:13:32,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 21:13:32,646 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 21:13:32,646 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 21:13:32,647 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:08:41" (3/4) ... [2021-12-18 21:13:32,649 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-18 21:13:32,649 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 21:13:32,650 INFO L158 Benchmark]: Toolchain (without parser) took 291691.01ms. Allocated memory was 48.2MB in the beginning and 916.5MB in the end (delta: 868.2MB). Free memory was 32.8MB in the beginning and 440.8MB in the end (delta: -408.0MB). Peak memory consumption was 458.2MB. Max. memory is 16.1GB. [2021-12-18 21:13:32,650 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 48.2MB. Free memory was 30.3MB in the beginning and 30.3MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:13:32,650 INFO L158 Benchmark]: CACSL2BoogieTranslator took 466.18ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 32.6MB in the beginning and 35.0MB in the end (delta: -2.4MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2021-12-18 21:13:32,650 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.72ms. Allocated memory is still 58.7MB. Free memory was 35.0MB in the beginning and 32.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:13:32,650 INFO L158 Benchmark]: Boogie Preprocessor took 47.60ms. Allocated memory is still 58.7MB. Free memory was 32.6MB in the beginning and 30.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:13:32,650 INFO L158 Benchmark]: RCFGBuilder took 463.52ms. Allocated memory is still 58.7MB. Free memory was 30.6MB in the beginning and 28.0MB in the end (delta: 2.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 21:13:32,651 INFO L158 Benchmark]: TraceAbstraction took 290635.22ms. Allocated memory was 58.7MB in the beginning and 916.5MB in the end (delta: 857.7MB). Free memory was 27.4MB in the beginning and 440.8MB in the end (delta: -413.4MB). Peak memory consumption was 442.7MB. Max. memory is 16.1GB. [2021-12-18 21:13:32,651 INFO L158 Benchmark]: Witness Printer took 14.67ms. Allocated memory is still 916.5MB. Free memory is still 440.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:13:32,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 48.2MB. Free memory was 30.3MB in the beginning and 30.3MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 466.18ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 32.6MB in the beginning and 35.0MB in the end (delta: -2.4MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.72ms. Allocated memory is still 58.7MB. Free memory was 35.0MB in the beginning and 32.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.60ms. Allocated memory is still 58.7MB. Free memory was 32.6MB in the beginning and 30.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 463.52ms. Allocated memory is still 58.7MB. Free memory was 30.6MB in the beginning and 28.0MB in the end (delta: 2.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 290635.22ms. Allocated memory was 58.7MB in the beginning and 916.5MB in the end (delta: 857.7MB). Free memory was 27.4MB in the beginning and 440.8MB in the end (delta: -413.4MB). Peak memory consumption was 442.7MB. Max. memory is 16.1GB. * Witness Printer took 14.67ms. Allocated memory is still 916.5MB. Free memory is still 440.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 780]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 780. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L757] struct ldv_list_head global_list_13 = { &(global_list_13), &(global_list_13) }; VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L781] CALL entry_point() [L776] CALL alloc_13() [L763] CALL, EXPR ldv_malloc(sizeof(struct A13)) VAL [\old(size)=12, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L763] RET, EXPR ldv_malloc(sizeof(struct A13)) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct A13))={6:0}] [L763] struct A13 *p = (struct A13 *)ldv_malloc(sizeof(struct A13)); [L764] COND TRUE \read(*p) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L765] CALL ldv_list_add(&p->list, &global_list_13) VAL [global_list_13={2:0}, head={2:0}, ldv_global_msg_list={1:0}, new={6:4}] [L559] EXPR head->next VAL [global_list_13={2:0}, head={2:0}, head={2:0}, head->next={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}] [L559] CALL __ldv_list_add(new, head, head->next) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, next={2:0}, prev={2:0}] [L547] next->prev = new VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L548] new->next = next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L549] new->prev = prev VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L550] prev->next = new VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L559] RET __ldv_list_add(new, head, head->next) VAL [global_list_13={2:0}, head={2:0}, head={2:0}, head->next={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}] [L765] RET ldv_list_add(&p->list, &global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L776] RET alloc_13() [L777] CALL free_unsafe_13() [L769] struct A13 *p; [L770] struct A13 *n; VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] EXPR (&global_list_13)->next VAL [(&global_list_13)->next={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); [L771] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [__mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L771] EXPR (p)->list.next VAL [(p)->list.next={2:0}, __mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L771] const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); [L771] n = ({ const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );}) VAL [__mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={6:0}] [L771] COND TRUE &p->list != (&global_list_13) VAL [__mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={6:0}] [L772] CALL ldv_list_del(&p->list) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->prev VAL [entry={6:4}, entry={6:4}, entry->prev={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->next VAL [entry={6:4}, entry={6:4}, entry->next={2:0}, entry->prev={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] CALL __ldv_list_del(entry->prev, entry->next) [L554] next->prev = prev VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L555] prev->next = next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L567] RET __ldv_list_del(entry->prev, entry->next) [L772] RET ldv_list_del(&p->list) VAL [__mptr={2:0}, __mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={6:0}] [L771] p = n VAL [__mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] EXPR (n)->list.next VAL [(n)->list.next={2:0}, __mptr={2:0}, __mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); [L771] n = ({ const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );}) VAL [__mptr={6:4}, __mptr={2:0}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] COND FALSE !(&p->list != (&global_list_13)) VAL [__mptr={2:0}, __mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L777] RET free_unsafe_13() [L778] CALL LDV_INIT_LIST_HEAD(&global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}] [L540] list->next = list VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}, list={2:0}] [L541] list->prev = list VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}, list={2:0}] [L778] RET LDV_INIT_LIST_HEAD(&global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L781] RET entry_point() - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 82 locations, 29 error locations. Started 1 CEGAR loops. OverallTime: 290.5s, OverallIterations: 32, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 27.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1977 SdHoareTripleChecker+Valid, 11.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1941 mSDsluCounter, 8400 SdHoareTripleChecker+Invalid, 9.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1627 IncrementalHoareTripleChecker+Unchecked, 6855 mSDsCounter, 400 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8110 IncrementalHoareTripleChecker+Invalid, 10137 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 400 mSolverCounterUnsat, 1545 mSDtfsCounter, 8110 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1270 GetRequests, 713 SyntacticMatches, 7 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 33.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=8, InterpolantAutomatonStates: 402, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 253 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 29.9s InterpolantComputationTime, 902 NumberOfCodeBlocks, 902 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 909 ConstructedInterpolants, 109 QuantifiedInterpolants, 13495 SizeOfPredicates, 360 NumberOfNonLiveVariables, 4568 ConjunctsInSsa, 800 ConjunctsInUnsatCore, 33 InterpolantComputations, 28 PerfectInterpolantSequences, 5/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-18 21:13:32,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample