./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:32,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:32,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:32,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:32,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:32,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:32,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:32,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:32,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:32,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:32,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:32,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:32,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:32,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:32,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:32,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:32,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:32,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:32,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:32,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:32,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:32,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:32,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:32,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:32,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:32,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:32,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:32,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:32,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:32,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:32,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:32,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:32,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:32,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:32,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:32,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:32,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:32,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:32,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:32,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:32,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:32,238 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:39:32,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:32,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:32,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:32,281 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:32,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:32,288 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:32,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:39:32,288 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:32,288 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:32,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:39:32,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:39:32,290 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:32,290 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:39:32,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:39:32,291 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:39:32,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:39:32,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:39:32,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:32,293 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:32,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:39:32,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:32,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:32,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:32,301 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:39:32,301 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:39:32,301 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:39:32,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:32,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:32,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:32,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:32,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:32,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:32,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:32,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:32,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:32,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:39:32,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:39:32,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:32,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:32,304 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2021-11-07 01:39:32,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:32,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:32,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:32,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:32,609 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:32,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-07 01:39:32,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/ea0faa472/b71e0dbbca1741e39bc06406da5e95c5/FLAGc7d352be1 [2021-11-07 01:39:33,200 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:33,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-07 01:39:33,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/ea0faa472/b71e0dbbca1741e39bc06406da5e95c5/FLAGc7d352be1 [2021-11-07 01:39:33,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/ea0faa472/b71e0dbbca1741e39bc06406da5e95c5 [2021-11-07 01:39:33,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:33,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:33,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:33,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:33,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:33,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:33" (1/1) ... [2021-11-07 01:39:33,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286e9c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:33, skipping insertion in model container [2021-11-07 01:39:33,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:33" (1/1) ... [2021-11-07 01:39:33,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:33,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:33,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:34,016 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) [2021-11-07 01:39:34,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19bfe6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:34, skipping insertion in model container [2021-11-07 01:39:34,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:34,018 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:39:34,020 INFO L168 Benchmark]: Toolchain (without parser) took 502.36 ms. Allocated memory is still 111.1 MB. Free memory was 74.1 MB in the beginning and 81.9 MB in the end (delta: -7.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:34,021 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 79.7 MB. Free memory was 49.7 MB in the beginning and 49.7 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:39:34,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 487.41 ms. Allocated memory is still 111.1 MB. Free memory was 73.8 MB in the beginning and 81.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:34,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 79.7 MB. Free memory was 49.7 MB in the beginning and 49.7 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 487.41 ms. Allocated memory is still 111.1 MB. Free memory was 73.8 MB in the beginning and 81.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * 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=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:36,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:36,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:36,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:36,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:36,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:36,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:36,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:36,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:36,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:36,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:36,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:36,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:36,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:36,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:36,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:36,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:36,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:36,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:36,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:36,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:36,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:36,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:36,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:36,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:36,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:36,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:36,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:36,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:36,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:36,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:36,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:36,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:36,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:36,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:36,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:36,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:36,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:36,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:36,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:36,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:36,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:39:36,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:36,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:36,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:36,369 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:36,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:36,369 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:36,369 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:36,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:36,370 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:36,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:39:36,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:39:36,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:36,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:36,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:39:36,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:36,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:36,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:36,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:39:36,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:39:36,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:39:36,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:36,376 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:36,376 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:39:36,376 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:39:36,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:36,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:36,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:36,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:39:36,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:36,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:36,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:36,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:36,381 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:39:36,381 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:36,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:36,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:36,382 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2021-11-07 01:39:36,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:36,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:36,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:36,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:36,822 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:36,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-07 01:39:36,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/5b4308163/60bc7d9f0a2843c29e588d3daa6f70b3/FLAG55c1ed93f [2021-11-07 01:39:37,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:37,578 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-07 01:39:37,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/5b4308163/60bc7d9f0a2843c29e588d3daa6f70b3/FLAG55c1ed93f [2021-11-07 01:39:37,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/data/5b4308163/60bc7d9f0a2843c29e588d3daa6f70b3 [2021-11-07 01:39:37,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:37,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:37,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:37,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:37,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:37,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:37" (1/1) ... [2021-11-07 01:39:37,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9ae7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:37, skipping insertion in model container [2021-11-07 01:39:37,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:37" (1/1) ... [2021-11-07 01:39:37,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:37,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:38,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:38,401 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:39:38,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:38,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:38,508 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:39:38,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:38,667 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:39:38,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38 WrapperNode [2021-11-07 01:39:38,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:38,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:38,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:39:38,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:39:38,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:38,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:39:38,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:39:38,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:39:38,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:39:38,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:39:38,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:39:38,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:39:38,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:38,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:39:38,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:39:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:39:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:39:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:39:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:39:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:39:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:39:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:39:38,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:39:39,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:39:39,555 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-11-07 01:39:39,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:39 BoogieIcfgContainer [2021-11-07 01:39:39,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:39:39,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:39:39,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:39:39,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:39:39,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:37" (1/3) ... [2021-11-07 01:39:39,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0045ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:39, skipping insertion in model container [2021-11-07 01:39:39,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (2/3) ... [2021-11-07 01:39:39,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0045ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:39, skipping insertion in model container [2021-11-07 01:39:39,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:39" (3/3) ... [2021-11-07 01:39:39,565 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11_1.i [2021-11-07 01:39:39,571 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:39:39,585 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2021-11-07 01:39:39,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:39:39,646 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 [2021-11-07 01:39:39,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2021-11-07 01:39:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 51 states have (on average 1.803921568627451) internal successors, (92), 83 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:39:39,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:39,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:39:39,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:39:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash 889508834, now seen corresponding path program 1 times [2021-11-07 01:39:39,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:39,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011589761] [2021-11-07 01:39:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:39,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:39,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:39,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:39,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:39:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:39,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:39,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:39,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011589761] [2021-11-07 01:39:39,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011589761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:39,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:39,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:39:39,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455781675] [2021-11-07 01:39:39,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:39,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:39,970 INFO L87 Difference]: Start difference. First operand has 84 states, 51 states have (on average 1.803921568627451) internal successors, (92), 83 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:40,246 INFO L93 Difference]: Finished difference Result 315 states and 337 transitions. [2021-11-07 01:39:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:40,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:39:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:40,262 INFO L225 Difference]: With dead ends: 315 [2021-11-07 01:39:40,262 INFO L226 Difference]: Without dead ends: 307 [2021-11-07 01:39:40,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-07 01:39:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 84. [2021-11-07 01:39:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 83 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-07 01:39:40,305 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 6 [2021-11-07 01:39:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:40,305 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-07 01:39:40,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-07 01:39:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:39:40,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:40,307 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:39:40,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:40,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:40,510 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:39:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash 889568416, now seen corresponding path program 1 times [2021-11-07 01:39:40,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:40,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247001201] [2021-11-07 01:39:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:40,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:40,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:40,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:39:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:40,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:40,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:40,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247001201] [2021-11-07 01:39:40,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247001201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:40,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:40,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:39:40,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108902152] [2021-11-07 01:39:40,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:40,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:40,615 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:40,798 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-11-07 01:39:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:39:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:40,801 INFO L225 Difference]: With dead ends: 160 [2021-11-07 01:39:40,801 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 01:39:40,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 01:39:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2021-11-07 01:39:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.78) internal successors, (89), 81 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2021-11-07 01:39:40,819 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 6 [2021-11-07 01:39:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:40,819 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2021-11-07 01:39:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2021-11-07 01:39:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:39:40,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:40,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:40,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:41,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:41,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:39:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -592189871, now seen corresponding path program 1 times [2021-11-07 01:39:41,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:41,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976767885] [2021-11-07 01:39:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:41,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:41,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:41,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:39:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:41,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:41,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:41,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:41,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976767885] [2021-11-07 01:39:41,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976767885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:41,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:41,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:39:41,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455028901] [2021-11-07 01:39:41,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:41,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:41,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:41,203 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:41,339 INFO L93 Difference]: Finished difference Result 294 states and 311 transitions. [2021-11-07 01:39:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:39:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:41,345 INFO L225 Difference]: With dead ends: 294 [2021-11-07 01:39:41,349 INFO L226 Difference]: Without dead ends: 294 [2021-11-07 01:39:41,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-07 01:39:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 84. [2021-11-07 01:39:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.75) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-11-07 01:39:41,363 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 9 [2021-11-07 01:39:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:41,364 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-11-07 01:39:41,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-11-07 01:39:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:39:41,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:41,365 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:41,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:41,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:41,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:39:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:41,577 INFO L85 PathProgramCache]: Analyzing trace with hash -592189907, now seen corresponding path program 1 times [2021-11-07 01:39:41,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:41,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062844515] [2021-11-07 01:39:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:41,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:41,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:41,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:41,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:39:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:41,698 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 [2021-11-07 01:39:41,774 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:39:41,776 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 18 treesize of output 23 [2021-11-07 01:39:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:41,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:41,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:41,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062844515] [2021-11-07 01:39:41,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062844515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:41,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:41,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:41,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273589695] [2021-11-07 01:39:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:41,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:41,907 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:42,151 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2021-11-07 01:39:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:39:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:42,155 INFO L225 Difference]: With dead ends: 190 [2021-11-07 01:39:42,155 INFO L226 Difference]: Without dead ends: 190 [2021-11-07 01:39:42,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-07 01:39:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 95. [2021-11-07 01:39:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 94 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-11-07 01:39:42,165 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 9 [2021-11-07 01:39:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:42,166 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-11-07 01:39:42,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-11-07 01:39:42,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:39:42,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:42,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:42,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:42,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:39:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash -592189906, now seen corresponding path program 1 times [2021-11-07 01:39:42,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:42,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763103262] [2021-11-07 01:39:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:42,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:42,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:42,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:39:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:39:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:42,498 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 [2021-11-07 01:39:42,504 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 [2021-11-07 01:39:42,647 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:39:42,648 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 31 treesize of output 33 [2021-11-07 01:39:42,661 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:39:42,662 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 25 treesize of output 25 [2021-11-07 01:39:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:42,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-07 01:39:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:43,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:43,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763103262] [2021-11-07 01:39:43,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763103262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:43,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:43,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:39:43,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186001429] [2021-11-07 01:39:43,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:39:43,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:39:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:39:43,272 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:11,325 INFO L93 Difference]: Finished difference Result 348 states and 372 transitions. [2021-11-07 01:40:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:40:11,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:40:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:11,328 INFO L225 Difference]: With dead ends: 348 [2021-11-07 01:40:11,328 INFO L226 Difference]: Without dead ends: 348 [2021-11-07 01:40:11,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:40:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-07 01:40:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 133. [2021-11-07 01:40:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 101 states have (on average 1.7227722772277227) internal successors, (174), 132 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2021-11-07 01:40:11,354 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 9 [2021-11-07 01:40:11,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:11,355 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2021-11-07 01:40:11,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2021-11-07 01:40:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:40:11,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:11,356 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:11,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:11,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:11,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:11,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1182817455, now seen corresponding path program 1 times [2021-11-07 01:40:11,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:11,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128081558] [2021-11-07 01:40:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:11,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:11,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:40:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:11,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:11,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:11,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128081558] [2021-11-07 01:40:11,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128081558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:11,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:11,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:40:11,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311905500] [2021-11-07 01:40:11,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:11,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:11,769 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:11,857 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-11-07 01:40:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:40:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:11,859 INFO L225 Difference]: With dead ends: 155 [2021-11-07 01:40:11,859 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 01:40:11,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 01:40:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 84. [2021-11-07 01:40:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-11-07 01:40:11,875 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 9 [2021-11-07 01:40:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:11,875 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-11-07 01:40:11,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-11-07 01:40:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:40:11,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:11,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:11,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:12,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:12,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1176169616, now seen corresponding path program 1 times [2021-11-07 01:40:12,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:12,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373230176] [2021-11-07 01:40:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:12,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:12,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:12,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:40:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:12,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:12,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373230176] [2021-11-07 01:40:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373230176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:12,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:12,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 01:40:12,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469939715] [2021-11-07 01:40:12,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:40:12,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:40:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:12,382 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:12,557 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2021-11-07 01:40:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:40:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:12,559 INFO L225 Difference]: With dead ends: 151 [2021-11-07 01:40:12,559 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 01:40:12,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:40:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 01:40:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 83. [2021-11-07 01:40:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-11-07 01:40:12,564 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 10 [2021-11-07 01:40:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:12,564 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-11-07 01:40:12,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-11-07 01:40:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:40:12,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:12,565 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:12,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:40:12,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:12,775 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -722596971, now seen corresponding path program 1 times [2021-11-07 01:40:12,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:12,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735911157] [2021-11-07 01:40:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:12,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:12,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:12,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:12,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:40:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:12,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:13,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:19,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:19,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735911157] [2021-11-07 01:40:19,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735911157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:19,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:19,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:40:19,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97062261] [2021-11-07 01:40:19,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:40:19,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:40:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2021-11-07 01:40:19,022 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:19,693 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2021-11-07 01:40:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 01:40:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:19,695 INFO L225 Difference]: With dead ends: 148 [2021-11-07 01:40:19,695 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 01:40:19,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=32, Invalid=76, Unknown=2, NotChecked=0, Total=110 [2021-11-07 01:40:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 01:40:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2021-11-07 01:40:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.66) internal successors, (83), 77 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-11-07 01:40:19,699 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 12 [2021-11-07 01:40:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-11-07 01:40:19,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-11-07 01:40:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:40:19,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:19,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:19,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:19,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:19,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:19,902 INFO L85 PathProgramCache]: Analyzing trace with hash -493394203, now seen corresponding path program 1 times [2021-11-07 01:40:19,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:19,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325966704] [2021-11-07 01:40:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:19,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:19,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:19,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:40:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:20,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325966704] [2021-11-07 01:40:20,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325966704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:20,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:20,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:40:20,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834504439] [2021-11-07 01:40:20,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:20,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:20,087 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:20,167 INFO L93 Difference]: Finished difference Result 251 states and 262 transitions. [2021-11-07 01:40:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:20,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:40:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:20,169 INFO L225 Difference]: With dead ends: 251 [2021-11-07 01:40:20,169 INFO L226 Difference]: Without dead ends: 251 [2021-11-07 01:40:20,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-07 01:40:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 80. [2021-11-07 01:40:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 79 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-11-07 01:40:20,173 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 14 [2021-11-07 01:40:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:20,174 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-11-07 01:40:20,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-11-07 01:40:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:40:20,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:20,174 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:20,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:20,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:20,384 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash -493394216, now seen corresponding path program 1 times [2021-11-07 01:40:20,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:20,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967642379] [2021-11-07 01:40:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:20,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:20,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:20,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:20,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:40:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:20,509 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 [2021-11-07 01:40:20,581 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:40:20,582 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 17 treesize of output 22 [2021-11-07 01:40:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:20,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967642379] [2021-11-07 01:40:20,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967642379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:20,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:20,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:20,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002229239] [2021-11-07 01:40:20,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:20,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:20,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:20,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:20,709 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:21,003 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2021-11-07 01:40:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:40:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:21,004 INFO L225 Difference]: With dead ends: 170 [2021-11-07 01:40:21,005 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 01:40:21,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 01:40:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 93. [2021-11-07 01:40:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2021-11-07 01:40:21,010 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 14 [2021-11-07 01:40:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:21,011 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2021-11-07 01:40:21,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2021-11-07 01:40:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:40:21,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:21,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:21,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:21,222 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -493394215, now seen corresponding path program 1 times [2021-11-07 01:40:21,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:21,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124170015] [2021-11-07 01:40:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:21,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:21,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:21,224 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:21,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:40:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:40:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:21,389 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 [2021-11-07 01:40:21,396 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 [2021-11-07 01:40:21,561 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:40:21,561 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 31 treesize of output 33 [2021-11-07 01:40:21,574 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:40:21,574 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 25 treesize of output 25 [2021-11-07 01:40:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:21,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:24,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-11-07 01:40:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:24,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:24,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124170015] [2021-11-07 01:40:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124170015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:24,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:24,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:40:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56422462] [2021-11-07 01:40:24,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:40:24,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:40:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-11-07 01:40:24,233 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:31,989 INFO L93 Difference]: Finished difference Result 315 states and 328 transitions. [2021-11-07 01:40:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:40:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:40:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:31,992 INFO L225 Difference]: With dead ends: 315 [2021-11-07 01:40:31,992 INFO L226 Difference]: Without dead ends: 315 [2021-11-07 01:40:31,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=149, Invalid=356, Unknown=1, NotChecked=0, Total=506 [2021-11-07 01:40:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-07 01:40:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 123. [2021-11-07 01:40:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.631578947368421) internal successors, (155), 122 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 155 transitions. [2021-11-07 01:40:31,998 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 155 transitions. Word has length 14 [2021-11-07 01:40:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:31,998 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 155 transitions. [2021-11-07 01:40:31,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 155 transitions. [2021-11-07 01:40:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:40:31,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:32,000 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:32,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:32,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:32,206 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash 186664154, now seen corresponding path program 1 times [2021-11-07 01:40:32,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:32,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819471010] [2021-11-07 01:40:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:32,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:32,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:32,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:40:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:32,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:32,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:32,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:32,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:32,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819471010] [2021-11-07 01:40:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819471010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:32,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:32,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:40:32,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713148419] [2021-11-07 01:40:32,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:32,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:32,433 INFO L87 Difference]: Start difference. First operand 123 states and 155 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:32,529 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2021-11-07 01:40:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:40:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:32,531 INFO L225 Difference]: With dead ends: 143 [2021-11-07 01:40:32,531 INFO L226 Difference]: Without dead ends: 141 [2021-11-07 01:40:32,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-07 01:40:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 80. [2021-11-07 01:40:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 79 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-11-07 01:40:32,535 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 14 [2021-11-07 01:40:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:32,535 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-11-07 01:40:32,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-11-07 01:40:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:40:32,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:32,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:32,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:32,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:32,746 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1886496085, now seen corresponding path program 1 times [2021-11-07 01:40:32,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:32,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111949897] [2021-11-07 01:40:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:32,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:32,749 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:32,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:40:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:32,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:32,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:32,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111949897] [2021-11-07 01:40:32,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 01:40:32,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707552463] [2021-11-07 01:40:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:32,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:32,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:32,985 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:33,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:40:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:33,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:33,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707552463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:33,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:33,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:33,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973078717] [2021-11-07 01:40:33,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:33,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:33,347 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:33,470 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-11-07 01:40:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:40:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:33,471 INFO L225 Difference]: With dead ends: 79 [2021-11-07 01:40:33,472 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 01:40:33,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 01:40:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 01:40:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.509090909090909) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-07 01:40:33,475 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 15 [2021-11-07 01:40:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:33,475 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-07 01:40:33,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-07 01:40:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:40:33,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:33,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:33,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:33,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:33,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:33,889 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1705438503, now seen corresponding path program 1 times [2021-11-07 01:40:33,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:33,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021804283] [2021-11-07 01:40:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:33,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:33,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:33,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:33,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:40:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:34,110 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:40:34,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-07 01:40:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:34,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:38,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:40:38,629 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 33 treesize of output 1 [2021-11-07 01:40:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:38,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021804283] [2021-11-07 01:40:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021804283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:38,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:40:38,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109224505] [2021-11-07 01:40:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:40:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:40:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=34, Unknown=2, NotChecked=0, Total=56 [2021-11-07 01:40:38,646 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:39,122 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2021-11-07 01:40:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:40:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:39,124 INFO L225 Difference]: With dead ends: 188 [2021-11-07 01:40:39,124 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 01:40:39,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=43, Invalid=65, Unknown=2, NotChecked=0, Total=110 [2021-11-07 01:40:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 01:40:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 78. [2021-11-07 01:40:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.490909090909091) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-07 01:40:39,128 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 16 [2021-11-07 01:40:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:39,128 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-07 01:40:39,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-07 01:40:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:40:39,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:39,129 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:39,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:39,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:39,329 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1705438502, now seen corresponding path program 1 times [2021-11-07 01:40:39,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:39,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807383499] [2021-11-07 01:40:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:39,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:39,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:39,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:39,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:40:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:40:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:39,526 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 [2021-11-07 01:40:39,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:40:39,636 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:40:39,636 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 [2021-11-07 01:40:39,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:40:39,661 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 18 treesize of output 18 [2021-11-07 01:40:39,796 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:40:39,796 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 17 treesize of output 17 [2021-11-07 01:40:39,807 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 [2021-11-07 01:40:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:39,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:40,353 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:40:40,354 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 33 treesize of output 32 [2021-11-07 01:40:40,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-07 01:40:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:41,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:41,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807383499] [2021-11-07 01:40:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807383499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:41,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:41,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-07 01:40:41,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230707040] [2021-11-07 01:40:41,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:40:41,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:40:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:40:41,030 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:48,664 INFO L93 Difference]: Finished difference Result 180 states and 187 transitions. [2021-11-07 01:40:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:40:48,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:40:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:48,666 INFO L225 Difference]: With dead ends: 180 [2021-11-07 01:40:48,666 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 01:40:48,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:40:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 01:40:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 77. [2021-11-07 01:40:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-11-07 01:40:48,670 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 16 [2021-11-07 01:40:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:48,670 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-11-07 01:40:48,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-11-07 01:40:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:40:48,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:48,672 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:48,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:48,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:48,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1751106330, now seen corresponding path program 1 times [2021-11-07 01:40:48,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:48,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722716223] [2021-11-07 01:40:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:48,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:48,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:40:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:40:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:49,215 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 [2021-11-07 01:40:49,267 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 [2021-11-07 01:40:49,406 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-07 01:40:49,406 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 42 treesize of output 40 [2021-11-07 01:40:49,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:49,566 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 65 treesize of output 56 [2021-11-07 01:40:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:49,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:50,138 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-07 01:40:50,139 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 78 treesize of output 77 [2021-11-07 01:40:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:50,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:50,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722716223] [2021-11-07 01:40:50,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722716223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:50,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:50,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 8] imperfect sequences [] total 19 [2021-11-07 01:40:50,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041237457] [2021-11-07 01:40:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:40:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:40:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:40:50,279 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:56,532 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2021-11-07 01:40:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:40:56,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:40:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:56,533 INFO L225 Difference]: With dead ends: 138 [2021-11-07 01:40:56,533 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 01:40:56,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:40:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 01:40:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2021-11-07 01:40:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.45) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-07 01:40:56,537 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 18 [2021-11-07 01:40:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:56,537 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-07 01:40:56,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-07 01:40:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:40:56,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:56,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:56,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:56,750 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:40:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1751106331, now seen corresponding path program 1 times [2021-11-07 01:40:56,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:56,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404941647] [2021-11-07 01:40:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:56,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:56,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:56,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:40:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:40:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:56,963 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 [2021-11-07 01:40:57,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:40:57,000 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 21 treesize of output 21 [2021-11-07 01:40:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:40:57,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:40:57,244 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:40:57,245 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 77 treesize of output 59 [2021-11-07 01:40:57,261 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:40:57,261 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 54 treesize of output 44 [2021-11-07 01:40:57,362 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 39 treesize of output 27 [2021-11-07 01:40:57,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-07 01:40:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:57,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:57,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:57,874 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 70 treesize of output 74 [2021-11-07 01:40:58,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:58,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:59,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:59,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404941647] [2021-11-07 01:40:59,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404941647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:59,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:59,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-11-07 01:40:59,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104896906] [2021-11-07 01:40:59,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:40:59,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:59,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:40:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:40:59,070 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:02,614 INFO L93 Difference]: Finished difference Result 177 states and 183 transitions. [2021-11-07 01:41:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:41:02,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:41:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:02,616 INFO L225 Difference]: With dead ends: 177 [2021-11-07 01:41:02,616 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 01:41:02,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:41:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 01:41:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 84. [2021-11-07 01:41:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-07 01:41:02,620 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 18 [2021-11-07 01:41:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:02,621 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-07 01:41:02,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-07 01:41:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:41:02,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:02,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:02,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:02,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:02,834 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:41:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:02,834 INFO L85 PathProgramCache]: Analyzing trace with hash 941759704, now seen corresponding path program 1 times [2021-11-07 01:41:02,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:02,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263287933] [2021-11-07 01:41:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:02,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:02,835 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:02,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:41:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:03,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:03,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263287933] [2021-11-07 01:41:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263287933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:03,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:03,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:41:03,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704379491] [2021-11-07 01:41:03,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:03,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:03,168 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:03,223 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-11-07 01:41:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:41:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:03,224 INFO L225 Difference]: With dead ends: 130 [2021-11-07 01:41:03,224 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 01:41:03,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 01:41:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2021-11-07 01:41:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.396551724137931) internal successors, (81), 77 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-07 01:41:03,227 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 18 [2021-11-07 01:41:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:03,227 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-07 01:41:03,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-07 01:41:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:41:03,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:03,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:03,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:03,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:03,434 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:41:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:03,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1469928108, now seen corresponding path program 1 times [2021-11-07 01:41:03,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:03,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198829246] [2021-11-07 01:41:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:03,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:03,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:03,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:41:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:41:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:06,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:11,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:11,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198829246] [2021-11-07 01:41:11,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198829246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:11,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:11,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-07 01:41:11,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457735573] [2021-11-07 01:41:11,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:41:11,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:41:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=168, Unknown=3, NotChecked=0, Total=210 [2021-11-07 01:41:11,677 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:18,927 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-11-07 01:41:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:41:18,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:41:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:18,928 INFO L225 Difference]: With dead ends: 79 [2021-11-07 01:41:18,928 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 01:41:18,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=76, Invalid=300, Unknown=4, NotChecked=0, Total=380 [2021-11-07 01:41:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 01:41:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 01:41:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.44) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-07 01:41:18,931 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 20 [2021-11-07 01:41:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:18,931 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-07 01:41:18,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-07 01:41:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:41:18,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:18,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:18,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:19,138 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:41:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash -373354461, now seen corresponding path program 1 times [2021-11-07 01:41:19,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:19,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312168522] [2021-11-07 01:41:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:19,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:19,140 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:19,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:41:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:19,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:41:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:19,463 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 [2021-11-07 01:41:19,491 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:41:19,491 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 20 [2021-11-07 01:41:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:41:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:41:19,579 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 [2021-11-07 01:41:19,722 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:41:19,722 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 64 treesize of output 50 [2021-11-07 01:41:19,739 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:41:19,740 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 53 treesize of output 47 [2021-11-07 01:41:19,820 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 48 treesize of output 40 [2021-11-07 01:41:19,932 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:41:19,932 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 43 treesize of output 26 [2021-11-07 01:41:20,026 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:41:20,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-11-07 01:41:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:20,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:15,507 INFO L354 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2021-11-07 01:42:15,507 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 233 treesize of output 193 [2021-11-07 01:42:17,531 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_76| (_ BitVec 32)) (ULTIMATE.start_entry_point_~fe~1.offset (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_76|)))) (select .cse0 (select (select .cse0 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset ULTIMATE.start_entry_point_~fe~1.offset)) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)) |v_ULTIMATE.start_ldv_malloc_#res.base_76|)) is different from false [2021-11-07 01:42:17,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:17,595 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 420 treesize of output 364 [2021-11-07 01:42:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:17,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:17,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312168522] [2021-11-07 01:42:17,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312168522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:17,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:17,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 15] imperfect sequences [] total 24 [2021-11-07 01:42:17,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418290034] [2021-11-07 01:42:17,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:42:17,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:42:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=474, Unknown=19, NotChecked=44, Total=600 [2021-11-07 01:42:17,784 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:33,530 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2021-11-07 01:42:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:42:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 01:42:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:33,532 INFO L225 Difference]: With dead ends: 158 [2021-11-07 01:42:33,532 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 01:42:33,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=341, Invalid=1284, Unknown=19, NotChecked=78, Total=1722 [2021-11-07 01:42:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 01:42:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 69. [2021-11-07 01:42:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.42) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-07 01:42:33,536 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 23 [2021-11-07 01:42:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:33,537 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-07 01:42:33,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-07 01:42:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:42:33,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:33,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:33,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:33,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:33,750 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:42:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -373354460, now seen corresponding path program 1 times [2021-11-07 01:42:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:33,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157528198] [2021-11-07 01:42:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:33,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:33,751 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:42:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:42:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:34,103 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 [2021-11-07 01:42:34,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:42:34,143 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 19 treesize of output 19 [2021-11-07 01:42:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:42:34,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:42:34,319 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 [2021-11-07 01:42:34,332 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 [2021-11-07 01:42:34,533 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:42:34,534 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 69 treesize of output 55 [2021-11-07 01:42:34,554 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:42:34,554 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 70 treesize of output 60 [2021-11-07 01:42:34,881 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-07 01:42:34,882 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 96 treesize of output 51 [2021-11-07 01:42:34,895 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:42:34,895 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 45 treesize of output 32 [2021-11-07 01:42:35,082 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:42:35,082 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 32 treesize of output 34 [2021-11-07 01:42:35,097 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:42:35,097 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 26 treesize of output 26 [2021-11-07 01:42:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:35,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:48,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1067 treesize of output 991 [2021-11-07 01:42:48,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 991 treesize of output 989 [2021-11-07 01:42:51,051 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_83| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset (_ bv0 32))))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_83|)) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)) (select (select .cse0 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)))) c_ULTIMATE.start_ldv_malloc_~size)) (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_83| (_ BitVec 32))) (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset (_ bv0 32))))) (select (select .cse2 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_83|)) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)) (select (select .cse2 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))) (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_83| (_ BitVec 32))) (= |v_ULTIMATE.start_ldv_malloc_#res.base_83| (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_83|)))) (select .cse3 (select (select .cse3 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset (_ bv0 32))) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))))) is different from false [2021-11-07 01:43:07,743 WARN L207 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 31 [2021-11-07 01:43:07,834 INFO L354 Elim1Store]: treesize reduction 53, result has 36.1 percent of original size [2021-11-07 01:43:07,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 467 treesize of output 472 [2021-11-07 01:43:07,939 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-07 01:43:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 428 treesize of output 374 [2021-11-07 01:43:08,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:08,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 493 treesize of output 429 [2021-11-07 01:43:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:08,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:08,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:08,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:08,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157528198] [2021-11-07 01:43:08,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157528198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:08,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:08,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [] total 27 [2021-11-07 01:43:08,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898483919] [2021-11-07 01:43:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 01:43:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 01:43:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=622, Unknown=8, NotChecked=50, Total=756 [2021-11-07 01:43:08,471 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:20,425 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2021-11-07 01:43:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:43:20,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 01:43:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:20,428 INFO L225 Difference]: With dead ends: 156 [2021-11-07 01:43:20,428 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 01:43:20,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=367, Invalid=1609, Unknown=8, NotChecked=86, Total=2070 [2021-11-07 01:43:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 01:43:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 68. [2021-11-07 01:43:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.4) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-07 01:43:20,431 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 23 [2021-11-07 01:43:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:20,432 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-07 01:43:20,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-07 01:43:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:20,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:20,432 INFO L513 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] [2021-11-07 01:43:20,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:20,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:20,633 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1310912225, now seen corresponding path program 1 times [2021-11-07 01:43:20,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:20,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699015730] [2021-11-07 01:43:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:20,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:20,635 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:43:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:21,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:21,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:21,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699015730] [2021-11-07 01:43:21,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699015730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:21,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:21,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:43:21,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936885022] [2021-11-07 01:43:21,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:21,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:21,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:21,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:21,060 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:21,132 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-11-07 01:43:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:43:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:21,135 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:43:21,135 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 01:43:21,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 01:43:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2021-11-07 01:43:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-07 01:43:21,137 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 24 [2021-11-07 01:43:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:21,138 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-07 01:43:21,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-07 01:43:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:21,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:21,139 INFO L513 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] [2021-11-07 01:43:21,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:21,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:21,346 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:21,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1312759267, now seen corresponding path program 1 times [2021-11-07 01:43:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:21,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952639074] [2021-11-07 01:43:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:21,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:21,347 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:21,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:43:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:21,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:21,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:21,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:21,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952639074] [2021-11-07 01:43:21,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952639074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:21,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:21,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:21,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055156865] [2021-11-07 01:43:21,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:21,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:21,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:21,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:21,917 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:22,044 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-11-07 01:43:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:43:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:22,045 INFO L225 Difference]: With dead ends: 88 [2021-11-07 01:43:22,045 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 01:43:22,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 01:43:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2021-11-07 01:43:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-07 01:43:22,047 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 24 [2021-11-07 01:43:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:22,047 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-07 01:43:22,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-07 01:43:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:43:22,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:22,048 INFO L513 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] [2021-11-07 01:43:22,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:22,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:22,254 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1312759268, now seen corresponding path program 1 times [2021-11-07 01:43:22,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:22,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032496231] [2021-11-07 01:43:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:22,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:22,256 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:22,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:43:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:43:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:22,623 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 [2021-11-07 01:43:22,632 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 [2021-11-07 01:43:22,710 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:43:22,710 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 17 treesize of output 17 [2021-11-07 01:43:22,722 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 [2021-11-07 01:43:22,837 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:43:22,838 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 [2021-11-07 01:43:22,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:43:22,859 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 17 treesize of output 17 [2021-11-07 01:43:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:23,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:25,595 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:43:25,595 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 37 treesize of output 36 [2021-11-07 01:43:26,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-07 01:43:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:26,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:26,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032496231] [2021-11-07 01:43:26,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032496231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:26,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:26,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-11-07 01:43:26,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160407904] [2021-11-07 01:43:26,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:43:26,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:26,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:43:26,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2021-11-07 01:43:26,385 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:30,415 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2021-11-07 01:43:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:43:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:43:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:30,417 INFO L225 Difference]: With dead ends: 126 [2021-11-07 01:43:30,417 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 01:43:30,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=113, Invalid=392, Unknown=1, NotChecked=0, Total=506 [2021-11-07 01:43:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 01:43:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 70. [2021-11-07 01:43:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.309090909090909) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-07 01:43:30,420 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 24 [2021-11-07 01:43:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:30,420 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-07 01:43:30,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-07 01:43:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:43:30,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:30,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:30,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:30,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:30,626 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1983617125, now seen corresponding path program 1 times [2021-11-07 01:43:30,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:30,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289935018] [2021-11-07 01:43:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:30,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:30,628 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:30,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:43:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 01:43:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:31,046 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 [2021-11-07 01:43:31,052 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 [2021-11-07 01:43:31,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:43:31,150 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 20 [2021-11-07 01:43:31,160 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 [2021-11-07 01:43:31,281 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:43:31,281 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 [2021-11-07 01:43:31,303 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:43:31,303 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 19 treesize of output 19 [2021-11-07 01:43:31,457 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:43:31,457 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 15 treesize of output 15 [2021-11-07 01:43:31,465 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 [2021-11-07 01:43:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:31,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:32,167 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:43:32,167 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 34 treesize of output 33 [2021-11-07 01:43:34,780 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:43:34,781 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 34 treesize of output 33 [2021-11-07 01:43:35,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-11-07 01:43:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:35,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:35,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289935018] [2021-11-07 01:43:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289935018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:35,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 17 [2021-11-07 01:43:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405350144] [2021-11-07 01:43:35,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:43:35,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:43:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=257, Unknown=1, NotChecked=0, Total=306 [2021-11-07 01:43:35,563 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:44,040 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-11-07 01:43:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:43:44,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:43:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:44,042 INFO L225 Difference]: With dead ends: 125 [2021-11-07 01:43:44,042 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 01:43:44,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=172, Invalid=583, Unknown=1, NotChecked=0, Total=756 [2021-11-07 01:43:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 01:43:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 66. [2021-11-07 01:43:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-07 01:43:44,045 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 25 [2021-11-07 01:43:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:44,045 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-07 01:43:44,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-07 01:43:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:43:44,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:44,046 INFO L513 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] [2021-11-07 01:43:44,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:44,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:44,250 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:44,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1362588745, now seen corresponding path program 1 times [2021-11-07 01:43:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:44,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408485185] [2021-11-07 01:43:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:44,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:44,251 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:44,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:43:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:44,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:44,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:44,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408485185] [2021-11-07 01:43:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408485185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:44,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:44,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:44,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400162470] [2021-11-07 01:43:44,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:44,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:44,774 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:44,828 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-11-07 01:43:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 01:43:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:44,829 INFO L225 Difference]: With dead ends: 65 [2021-11-07 01:43:44,829 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 01:43:44,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 01:43:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-07 01:43:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-11-07 01:43:44,832 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 26 [2021-11-07 01:43:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-11-07 01:43:44,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-11-07 01:43:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:43:44,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:44,832 INFO L513 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] [2021-11-07 01:43:44,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:45,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:45,042 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash -709421756, now seen corresponding path program 1 times [2021-11-07 01:43:45,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:45,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779973754] [2021-11-07 01:43:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:45,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:45,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:45,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:43:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:45,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:45,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779973754] [2021-11-07 01:43:45,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 01:43:45,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175200615] [2021-11-07 01:43:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:45,723 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:45,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:45,739 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:45,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:43:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:46,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:46,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175200615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:46,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:46,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:46,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159508478] [2021-11-07 01:43:46,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:46,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:46,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:46,444 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:46,589 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-11-07 01:43:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:43:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:46,591 INFO L225 Difference]: With dead ends: 132 [2021-11-07 01:43:46,591 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 01:43:46,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:43:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 01:43:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 70. [2021-11-07 01:43:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.263157894736842) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-07 01:43:46,594 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 27 [2021-11-07 01:43:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-07 01:43:46,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-07 01:43:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:43:46,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:46,595 INFO L513 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] [2021-11-07 01:43:46,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 01:43:46,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:46,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:46,998 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1560815527, now seen corresponding path program 1 times [2021-11-07 01:43:46,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:46,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162055148] [2021-11-07 01:43:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:46,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:46,999 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:47,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:43:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:43:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:47,569 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:43:47,569 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 [2021-11-07 01:43:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:47,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162055148] [2021-11-07 01:43:47,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162055148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:47,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:47,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:43:47,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718478447] [2021-11-07 01:43:47,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:47,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:47,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:47,596 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:47,801 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-11-07 01:43:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:43:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:47,802 INFO L225 Difference]: With dead ends: 95 [2021-11-07 01:43:47,802 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 01:43:47,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 01:43:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2021-11-07 01:43:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.271186440677966) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-07 01:43:47,804 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 27 [2021-11-07 01:43:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:47,804 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-07 01:43:47,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-07 01:43:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:43:47,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:47,805 INFO L513 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] [2021-11-07 01:43:47,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:48,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:48,005 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1560815526, now seen corresponding path program 1 times [2021-11-07 01:43:48,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:48,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496996079] [2021-11-07 01:43:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:48,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:48,007 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:48,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:43:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:48,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:43:48,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:48,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:48,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:43:48,864 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 24 treesize of output 28 [2021-11-07 01:43:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:49,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:49,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496996079] [2021-11-07 01:43:49,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496996079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:49,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:49,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-07 01:43:49,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140162775] [2021-11-07 01:43:49,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:43:49,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:43:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:43:49,376 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:49,776 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-11-07 01:43:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:43:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:43:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:49,777 INFO L225 Difference]: With dead ends: 71 [2021-11-07 01:43:49,777 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 01:43:49,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:43:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 01:43:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-07 01:43:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-07 01:43:49,779 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 27 [2021-11-07 01:43:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-07 01:43:49,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-07 01:43:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:43:49,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:49,781 INFO L513 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] [2021-11-07 01:43:49,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:49,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:49,986 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1518768382, now seen corresponding path program 1 times [2021-11-07 01:43:49,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:49,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923913700] [2021-11-07 01:43:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:49,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:49,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:49,988 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:49,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:43:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:50,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:50,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:50,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923913700] [2021-11-07 01:43:50,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923913700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:50,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:50,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:43:50,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810777593] [2021-11-07 01:43:50,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:50,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:50,578 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:50,661 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-07 01:43:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:43:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:50,662 INFO L225 Difference]: With dead ends: 91 [2021-11-07 01:43:50,662 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 01:43:50,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:50,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 01:43:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-11-07 01:43:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-07 01:43:50,664 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 27 [2021-11-07 01:43:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:50,665 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-07 01:43:50,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-07 01:43:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:43:50,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:50,665 INFO L513 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] [2021-11-07 01:43:50,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:50,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:50,866 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -517237845, now seen corresponding path program 1 times [2021-11-07 01:43:50,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:50,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908931391] [2021-11-07 01:43:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:50,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:50,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:50,867 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:50,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:43:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:51,377 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 [2021-11-07 01:43:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:51,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:51,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:51,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908931391] [2021-11-07 01:43:51,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908931391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:51,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:51,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:51,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654845664] [2021-11-07 01:43:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:51,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:51,503 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:51,648 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-07 01:43:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:51,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 01:43:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:51,649 INFO L225 Difference]: With dead ends: 64 [2021-11-07 01:43:51,649 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 01:43:51,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 01:43:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-07 01:43:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-07 01:43:51,651 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 28 [2021-11-07 01:43:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:51,652 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-07 01:43:51,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-07 01:43:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:43:51,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:51,653 INFO L513 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] [2021-11-07 01:43:51,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:51,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:51,865 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:43:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:51,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1150641166, now seen corresponding path program 1 times [2021-11-07 01:43:51,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:51,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803055201] [2021-11-07 01:43:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:51,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:51,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:51,867 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:51,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:43:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:43:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:52,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:43:52,518 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 16 treesize of output 16 [2021-11-07 01:43:52,666 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:43:52,667 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 21 treesize of output 26 [2021-11-07 01:43:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:52,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:52,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:43:52,869 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 26 treesize of output 30 [2021-11-07 01:43:53,116 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:43:53,116 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 24 treesize of output 23 [2021-11-07 01:43:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:53,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:53,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803055201] [2021-11-07 01:43:53,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803055201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:53,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:53,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 12 [2021-11-07 01:43:53,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256183913] [2021-11-07 01:43:53,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:43:53,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:43:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:43:53,152 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:08,085 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-11-07 01:44:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:44:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:44:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:08,086 INFO L225 Difference]: With dead ends: 101 [2021-11-07 01:44:08,086 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 01:44:08,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:44:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 01:44:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2021-11-07 01:44:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-07 01:44:08,089 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 30 [2021-11-07 01:44:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:08,089 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-07 01:44:08,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-07 01:44:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:44:08,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:08,102 INFO L513 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] [2021-11-07 01:44:08,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:08,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:08,310 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:08,310 INFO L85 PathProgramCache]: Analyzing trace with hash -775819286, now seen corresponding path program 1 times [2021-11-07 01:44:08,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:08,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823030400] [2021-11-07 01:44:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:08,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:08,312 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:08,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:44:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 01:44:08,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:09,123 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 [2021-11-07 01:44:09,131 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 [2021-11-07 01:44:09,227 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 29 treesize of output 21 [2021-11-07 01:44:09,230 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 18 treesize of output 10 [2021-11-07 01:44:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:09,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:09,485 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 38 treesize of output 32 [2021-11-07 01:44:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:09,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:09,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:09,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823030400] [2021-11-07 01:44:09,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823030400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:09,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:09,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 16 [2021-11-07 01:44:09,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415563592] [2021-11-07 01:44:09,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:44:09,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:44:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:09,677 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:10,590 INFO L93 Difference]: Finished difference Result 99 states and 98 transitions. [2021-11-07 01:44:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:44:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:10,591 INFO L225 Difference]: With dead ends: 99 [2021-11-07 01:44:10,591 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 01:44:10,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:44:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 01:44:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2021-11-07 01:44:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-11-07 01:44:10,594 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 32 [2021-11-07 01:44:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:10,594 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-11-07 01:44:10,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-11-07 01:44:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:44:10,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:10,595 INFO L513 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] [2021-11-07 01:44:10,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:10,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:10,806 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -775819029, now seen corresponding path program 1 times [2021-11-07 01:44:10,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:10,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176158168] [2021-11-07 01:44:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:10,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:10,807 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:10,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:44:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:11,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:11,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:11,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176158168] [2021-11-07 01:44:11,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176158168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:11,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:11,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656642933] [2021-11-07 01:44:11,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:11,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:11,522 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:11,575 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-11-07 01:44:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:44:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:11,576 INFO L225 Difference]: With dead ends: 66 [2021-11-07 01:44:11,576 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 01:44:11,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 01:44:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-07 01:44:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-07 01:44:11,578 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 32 [2021-11-07 01:44:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-07 01:44:11,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-07 01:44:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:44:11,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:11,578 INFO L513 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] [2021-11-07 01:44:11,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:11,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:11,779 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1719414022, now seen corresponding path program 1 times [2021-11-07 01:44:11,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:11,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028119427] [2021-11-07 01:44:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:11,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:11,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:11,780 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:11,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:44:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:12,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:12,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028119427] [2021-11-07 01:44:12,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 01:44:12,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [975479301] [2021-11-07 01:44:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:12,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:12,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:12,443 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:12,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 01:44:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:13,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:13,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:13,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [975479301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:13,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:13,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:13,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73641412] [2021-11-07 01:44:13,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:13,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:13,448 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:13,525 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-11-07 01:44:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:44:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:13,532 INFO L225 Difference]: With dead ends: 65 [2021-11-07 01:44:13,532 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 01:44:13,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 01:44:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-07 01:44:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-07 01:44:13,534 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 33 [2021-11-07 01:44:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:13,535 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-07 01:44:13,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-07 01:44:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:44:13,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:13,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:13,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-07 01:44:13,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-07 01:44:13,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:13,939 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1762227277, now seen corresponding path program 1 times [2021-11-07 01:44:13,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:13,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695407893] [2021-11-07 01:44:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:13,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:13,942 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:13,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 01:44:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:14,529 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 [2021-11-07 01:44:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:14,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:14,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:14,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695407893] [2021-11-07 01:44:14,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695407893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:14,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:14,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:14,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992648189] [2021-11-07 01:44:14,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:14,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:14,753 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:14,887 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-07 01:44:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:44:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:14,888 INFO L225 Difference]: With dead ends: 68 [2021-11-07 01:44:14,888 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 01:44:14,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 01:44:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-07 01:44:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-07 01:44:14,891 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 34 [2021-11-07 01:44:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:14,891 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-07 01:44:14,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-07 01:44:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:44:14,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:14,891 INFO L513 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] [2021-11-07 01:44:14,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:15,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:15,092 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 281046357, now seen corresponding path program 1 times [2021-11-07 01:44:15,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:15,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965051607] [2021-11-07 01:44:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:15,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:15,106 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:15,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 01:44:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 01:44:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:16,127 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 [2021-11-07 01:44:16,215 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 [2021-11-07 01:44:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:16,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:16,421 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 38 treesize of output 32 [2021-11-07 01:44:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:16,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:16,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965051607] [2021-11-07 01:44:16,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965051607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:16,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:16,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 11] imperfect sequences [] total 19 [2021-11-07 01:44:16,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386716423] [2021-11-07 01:44:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:44:16,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:44:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:16,710 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:17,449 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-07 01:44:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:17,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:44:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:17,450 INFO L225 Difference]: With dead ends: 67 [2021-11-07 01:44:17,450 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 01:44:17,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:44:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 01:44:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-07 01:44:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-11-07 01:44:17,452 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 35 [2021-11-07 01:44:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:17,452 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-11-07 01:44:17,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-11-07 01:44:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:44:17,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:17,453 INFO L513 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] [2021-11-07 01:44:17,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:17,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:17,667 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash 122502611, now seen corresponding path program 1 times [2021-11-07 01:44:17,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:17,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705046604] [2021-11-07 01:44:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:17,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:17,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:17,669 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:17,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 01:44:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 01:44:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:18,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:18,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705046604] [2021-11-07 01:44:18,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 01:44:18,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1978689757] [2021-11-07 01:44:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:18,728 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:18,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 01:44:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 01:44:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:19,964 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 17 treesize of output 13 [2021-11-07 01:44:20,136 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 [2021-11-07 01:44:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:20,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:20,551 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 38 treesize of output 32 [2021-11-07 01:44:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:20,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1978689757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:20,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:20,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 11] imperfect sequences [] total 19 [2021-11-07 01:44:20,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988351868] [2021-11-07 01:44:20,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:44:20,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:44:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:44:20,956 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:22,720 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-11-07 01:44:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:44:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 01:44:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:22,723 INFO L225 Difference]: With dead ends: 76 [2021-11-07 01:44:22,723 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 01:44:22,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:44:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 01:44:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-11-07 01:44:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.098360655737705) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-07 01:44:22,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 36 [2021-11-07 01:44:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:22,725 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-07 01:44:22,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-07 01:44:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:44:22,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:22,725 INFO L513 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] [2021-11-07 01:44:22,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:22,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:23,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:23,126 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-07 01:44:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash -497386217, now seen corresponding path program 1 times [2021-11-07 01:44:23,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:23,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084985477] [2021-11-07 01:44:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:23,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:23,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:23,128 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:23,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-07 01:44:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:44:23,896 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:44:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:44:24,123 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-07 01:44:24,123 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:44:24,124 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-11-07 01:44:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-11-07 01:44:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-11-07 01:44:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-11-07 01:44:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-11-07 01:44:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-11-07 01:44:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-11-07 01:44:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-11-07 01:44:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-11-07 01:44:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-11-07 01:44:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-11-07 01:44:24,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-11-07 01:44:24,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-11-07 01:44:24,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-11-07 01:44:24,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-11-07 01:44:24,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-11-07 01:44:24,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:44:24,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK [2021-11-07 01:44:24,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:24,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:24,348 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:24,351 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:44:24,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:44:24 BoogieIcfgContainer [2021-11-07 01:44:24,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:44:24,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:44:24,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:44:24,421 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:44:24,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:39" (3/4) ... [2021-11-07 01:44:24,422 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:44:24,516 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:44:24,516 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:44:24,517 INFO L168 Benchmark]: Toolchain (without parser) took 286666.75 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 32.6 MB in the beginning and 47.9 MB in the end (delta: -15.3 MB). Peak memory consumption was 44.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,518 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:24,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 808.06 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 32.4 MB in the beginning and 53.4 MB in the end (delta: -21.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,519 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.76 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 50.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,520 INFO L168 Benchmark]: Boogie Preprocessor took 39.80 ms. Allocated memory is still 71.3 MB. Free memory was 50.8 MB in the beginning and 49.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,520 INFO L168 Benchmark]: RCFGBuilder took 745.47 ms. Allocated memory is still 71.3 MB. Free memory was 49.0 MB in the beginning and 47.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,526 INFO L168 Benchmark]: TraceAbstraction took 284861.52 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 47.3 MB in the beginning and 29.2 MB in the end (delta: 18.2 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,526 INFO L168 Benchmark]: Witness Printer took 96.13 ms. Allocated memory is still 88.1 MB. Free memory was 29.2 MB in the beginning and 47.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 808.06 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 32.4 MB in the beginning and 53.4 MB in the end (delta: -21.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 95.76 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 50.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.80 ms. Allocated memory is still 71.3 MB. Free memory was 50.8 MB in the beginning and 49.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 745.47 ms. Allocated memory is still 71.3 MB. Free memory was 49.0 MB in the beginning and 47.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 284861.52 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 47.3 MB in the beginning and 29.2 MB in the end (delta: 18.2 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. * Witness Printer took 96.13 ms. Allocated memory is still 88.1 MB. Free memory was 29.2 MB in the beginning and 47.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * 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 - CounterExampleResult [Line: 799]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={-134217728:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L803] struct ldv_i2c_client *c11 = (struct ldv_i2c_client *)ldv_malloc(sizeof(struct ldv_i2c_client)); [L804] COND FALSE !(!c11) [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L805-L806] struct ldv_m88ts2022_config *cfg = (struct ldv_m88ts2022_config *) ldv_malloc(sizeof(struct ldv_m88ts2022_config)); [L807] COND FALSE !(!cfg) VAL [ldv_global_msg_list={-134217728:0}] [L808] c11->dev.platform_data = cfg VAL [ldv_global_msg_list={-134217728:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L809-L810] struct ldv_dvb_frontend *fe = (struct ldv_dvb_frontend *) ldv_malloc(sizeof(struct ldv_dvb_frontend)); [L811] COND FALSE !(!fe) VAL [ldv_global_msg_list={-134217728:0}] [L812] cfg->fe = fe VAL [ldv_global_msg_list={-134217728:0}] [L784] EXPR client->dev.platform_data VAL [ldv_global_msg_list={-134217728:0}] [L784] struct ldv_m88ts2022_config *cfg = client->dev.platform_data; [L785] EXPR cfg->fe VAL [ldv_global_msg_list={-134217728:0}] [L785] struct ldv_dvb_frontend *fe = cfg->fe; [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L786] struct Data11 *priv = (struct Data11*)ldv_malloc(sizeof(struct Data11)); [L787] COND FALSE !(!priv) VAL [ldv_global_msg_list={-134217728:0}] [L788] fe->tuner_priv = priv VAL [ldv_global_msg_list={-134217728:0}] [L623] dev->driver_data = data VAL [ldv_global_msg_list={-134217728:0}] [L790] free(priv) VAL [ldv_global_msg_list={-134217728:0}] [L790] free(priv) VAL [ldv_global_msg_list={-134217728:0}] [L790] free(priv) [L791] return 0; VAL [ldv_global_msg_list={-134217728:0}] [L619] EXPR dev->driver_data VAL [ldv_global_msg_list={-134217728:0}] [L619] return dev->driver_data; [L774] return ldv_dev_get_drvdata(&dev->dev); [L797] void *priv = (struct Data11*)ldv_i2c_get_clientdata(client); [L798] COND TRUE \read(*priv) VAL [ldv_global_msg_list={-134217728:0}] [L799] free(priv) VAL [ldv_global_msg_list={-134217728:0}] [L799] free(priv) VAL [ldv_global_msg_list={-134217728:0}] [L799] free(priv) VAL [ldv_global_msg_list={-134217728:0}] - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 808]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 812]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 812]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 799]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 799]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 823]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 32 error locations. Started 1 CEGAR loops. OverallTime: 284.7s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 123.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2438 SDtfs, 11939 SDslu, 6588 SDs, 0 SdLazy, 7355 SolverSat, 808 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 84.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1741 GetRequests, 1222 SyntacticMatches, 31 SemanticMatches, 488 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 157.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=5, InterpolantAutomatonStates: 355, 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, 38 MinimizatonAttempts, 2484 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 137.2s InterpolantComputationTime, 932 NumberOfCodeBlocks, 932 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1492 ConstructedInterpolants, 87 QuantifiedInterpolants, 12186 SizeOfPredicates, 402 NumberOfNonLiveVariables, 4063 ConjunctsInSsa, 530 ConjunctsInUnsatCore, 76 InterpolantComputations, 76 PerfectInterpolantSequences, 0/0 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 proved your program to be incorrect! [2021-11-07 01:44:24,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69a2ba7-15b9-4cb0-a694-c609ed36873d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)