./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:05:34,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:05:34,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:05:34,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:05:34,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:05:34,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:05:34,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:05:34,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:05:34,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:05:34,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:05:34,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:05:34,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:05:34,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:05:34,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:05:34,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:05:34,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:05:34,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:05:34,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:05:34,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:05:34,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:05:34,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:05:34,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:05:34,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:05:34,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:05:34,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:05:34,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:05:34,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:05:34,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:05:34,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:05:34,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:05:34,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:05:34,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:05:34,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:05:34,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:05:34,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:05:34,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:05:34,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:05:34,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:05:34,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:05:34,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:05:34,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:05:34,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:05:34,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:05:34,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:05:34,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:05:34,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:05:34,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:05:34,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:05:34,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:05:34,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:05:34,243 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:05:34,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:05:34,244 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:05:34,245 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:05:34,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:05:34,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:05:34,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:05:34,246 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:05:34,246 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:05:34,246 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:05:34,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:05:34,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:05:34,247 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:05:34,247 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:05:34,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:05:34,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:05:34,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:05:34,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:05:34,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:05:34,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:05:34,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:05:34,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:05:34,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2022-11-02 20:05:34,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:05:34,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:05:34,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:05:34,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:05:34,669 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:05:34,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2022-11-02 20:05:34,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/41153b7ab/89b23212ee0644e48f1b543139846440/FLAG3e4f81dce [2022-11-02 20:05:35,450 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:05:35,456 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2022-11-02 20:05:35,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/41153b7ab/89b23212ee0644e48f1b543139846440/FLAG3e4f81dce [2022-11-02 20:05:35,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/41153b7ab/89b23212ee0644e48f1b543139846440 [2022-11-02 20:05:35,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:05:35,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:05:35,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:05:35,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:05:35,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:05:35,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:05:35" (1/1) ... [2022-11-02 20:05:35,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe681a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:35, skipping insertion in model container [2022-11-02 20:05:35,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:05:35" (1/1) ... [2022-11-02 20:05:35,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:05:35,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:05:36,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:05:36,214 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-02 20:05:36,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1da1a39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:36, skipping insertion in model container [2022-11-02 20:05:36,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:05:36,216 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-02 20:05:36,218 INFO L158 Benchmark]: Toolchain (without parser) took 532.58ms. Allocated memory is still 102.8MB. Free memory was 70.0MB in the beginning and 74.4MB in the end (delta: -4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:05:36,219 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory was 57.1MB in the beginning and 57.0MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:05:36,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 529.65ms. Allocated memory is still 102.8MB. Free memory was 69.7MB in the beginning and 74.4MB in the end (delta: -4.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:05:36,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory was 57.1MB in the beginning and 57.0MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 529.65ms. Allocated memory is still 102.8MB. Free memory was 69.7MB in the beginning and 74.4MB in the end (delta: -4.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:05:38,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:05:38,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:05:38,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:05:38,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:05:38,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:05:38,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:05:38,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:05:38,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:05:38,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:05:38,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:05:38,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:05:38,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:05:38,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:05:38,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:05:38,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:05:38,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:05:38,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:05:38,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:05:38,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:05:38,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:05:38,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:05:38,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:05:38,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:05:38,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:05:38,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:05:38,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:05:38,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:05:38,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:05:38,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:05:38,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:05:38,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:05:38,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:05:38,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:05:38,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:05:38,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:05:38,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:05:38,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:05:38,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:05:38,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:05:38,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:05:38,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-02 20:05:38,695 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:05:38,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:05:38,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:05:38,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:05:38,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:05:38,697 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:05:38,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:05:38,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:05:38,698 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:05:38,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:05:38,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:05:38,702 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:05:38,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:05:38,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:05:38,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:05:38,703 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:05:38,703 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:05:38,703 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:05:38,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:05:38,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:05:38,704 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:05:38,704 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:05:38,704 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:05:38,705 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:05:38,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:05:38,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:05:38,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:05:38,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:05:38,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:05:38,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:05:38,707 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:05:38,707 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:05:38,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:05:38,707 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_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2022-11-02 20:05:39,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:05:39,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:05:39,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:05:39,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:05:39,139 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:05:39,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2022-11-02 20:05:39,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/f044134b8/002d430f3ab646449456bb3287089a52/FLAG994f89754 [2022-11-02 20:05:39,941 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:05:39,942 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2022-11-02 20:05:39,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/f044134b8/002d430f3ab646449456bb3287089a52/FLAG994f89754 [2022-11-02 20:05:40,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/data/f044134b8/002d430f3ab646449456bb3287089a52 [2022-11-02 20:05:40,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:05:40,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:05:40,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:05:40,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:05:40,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:05:40,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:05:40" (1/1) ... [2022-11-02 20:05:40,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442a27b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:40, skipping insertion in model container [2022-11-02 20:05:40,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:05:40" (1/1) ... [2022-11-02 20:05:40,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:05:40,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:05:40,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:05:40,852 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 20:05:40,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:05:40,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:05:40,974 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:05:41,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:05:41,116 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:05:41,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41 WrapperNode [2022-11-02 20:05:41,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:05:41,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:05:41,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:05:41,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:05:41,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,207 INFO L138 Inliner]: procedures = 167, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 53 [2022-11-02 20:05:41,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:05:41,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:05:41,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:05:41,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:05:41,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,281 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:05:41,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:05:41,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:05:41,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:05:41,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (1/1) ... [2022-11-02 20:05:41,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:05:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:41,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:05:41,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:05:41,384 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-11-02 20:05:41,384 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-11-02 20:05:41,384 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-11-02 20:05:41,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-11-02 20:05:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 20:05:41,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 20:05:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2022-11-02 20:05:41,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2022-11-02 20:05:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:05:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:05:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:05:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:05:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:05:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-11-02 20:05:41,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-11-02 20:05:41,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:05:41,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:05:41,571 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:05:41,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:05:42,024 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:05:42,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:05:42,032 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:05:42,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:05:42 BoogieIcfgContainer [2022-11-02 20:05:42,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:05:42,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:05:42,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:05:42,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:05:42,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:05:40" (1/3) ... [2022-11-02 20:05:42,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3e49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:05:42, skipping insertion in model container [2022-11-02 20:05:42,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:05:41" (2/3) ... [2022-11-02 20:05:42,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3e49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:05:42, skipping insertion in model container [2022-11-02 20:05:42,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:05:42" (3/3) ... [2022-11-02 20:05:42,043 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test13_2.i [2022-11-02 20:05:42,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:05:42,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2022-11-02 20:05:42,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:05:42,139 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ad106a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:05:42,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2022-11-02 20:05:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:05:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:05:42,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:05:42,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:42,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:05:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1285123929, now seen corresponding path program 1 times [2022-11-02 20:05:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:05:42,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929948842] [2022-11-02 20:05:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:42,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:05:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:05:42,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:05:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:05:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:05:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:42,728 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 20:05:42,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 20:05:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:42,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:05:42,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:05:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929948842] [2022-11-02 20:05:42,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929948842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:42,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:42,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:05:42,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140406657] [2022-11-02 20:05:42,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:42,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:05:42,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:05:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:05:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:05:42,857 INFO L87 Difference]: Start difference. First operand has 82 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:05:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:05:43,475 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-11-02 20:05:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:05:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-02 20:05:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:05:43,489 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:05:43,489 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:05:43,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:05:43,495 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 170 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:05:43,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 104 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 22 Unchecked, 0.4s Time] [2022-11-02 20:05:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:05:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-11-02 20:05:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 68 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:05:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-11-02 20:05:43,543 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 12 [2022-11-02 20:05:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:05:43,544 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-11-02 20:05:43,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:05:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-11-02 20:05:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:05:43,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:05:43,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:43,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:43,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:05:43,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:05:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1285123928, now seen corresponding path program 1 times [2022-11-02 20:05:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:05:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976591005] [2022-11-02 20:05:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:43,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:05:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:05:43,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:05:43,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:05:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:05:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:05:46,125 INFO L390 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 [2022-11-02 20:05:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:46,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:05:46,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:05:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976591005] [2022-11-02 20:05:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976591005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:46,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:46,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:05:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082000139] [2022-11-02 20:05:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:46,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:05:46,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:05:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:05:46,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2022-11-02 20:05:46,265 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:05:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:05:51,142 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-11-02 20:05:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:05:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-02 20:05:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:05:51,146 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:05:51,146 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:05:51,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=55, Invalid=124, Unknown=3, NotChecked=0, Total=182 [2022-11-02 20:05:51,148 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 124 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:05:51,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 107 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-11-02 20:05:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:05:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2022-11-02 20:05:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:05:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-11-02 20:05:51,162 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 12 [2022-11-02 20:05:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:05:51,162 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-11-02 20:05:51,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:05:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-11-02 20:05:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:05:51,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:05:51,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:51,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:51,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:05:51,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:05:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash 211575775, now seen corresponding path program 1 times [2022-11-02 20:05:51,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:05:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875600185] [2022-11-02 20:05:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:51,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:05:51,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:05:51,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:05:51,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:05:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:05:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:51,627 INFO L390 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 [2022-11-02 20:05:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:51,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:05:51,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:05:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875600185] [2022-11-02 20:05:51,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875600185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:51,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:51,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:05:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880542338] [2022-11-02 20:05:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:51,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:05:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:05:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:05:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:05:51,693 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:05:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:05:52,366 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-11-02 20:05:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:05:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-02 20:05:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:05:52,369 INFO L225 Difference]: With dead ends: 109 [2022-11-02 20:05:52,369 INFO L226 Difference]: Without dead ends: 109 [2022-11-02 20:05:52,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:05:52,371 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 64 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:05:52,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 314 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:05:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-02 20:05:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2022-11-02 20:05:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 65 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:05:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-11-02 20:05:52,393 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 15 [2022-11-02 20:05:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:05:52,393 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-11-02 20:05:52,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:05:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-11-02 20:05:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:05:52,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:05:52,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:52,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:05:52,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:05:52,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 211575776, now seen corresponding path program 1 times [2022-11-02 20:05:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:05:52,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626428996] [2022-11-02 20:05:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:52,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:05:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:05:52,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:05:52,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:05:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:05:52,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:55,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:05:55,062 INFO L390 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 [2022-11-02 20:05:55,312 INFO L390 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 [2022-11-02 20:05:55,319 INFO L390 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 [2022-11-02 20:05:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:55,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:05:55,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:05:55,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626428996] [2022-11-02 20:05:55,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626428996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:55,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:55,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:05:55,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688420479] [2022-11-02 20:05:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:55,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:05:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:05:55,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:05:55,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2022-11-02 20:05:55,464 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:01,220 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-02 20:06:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:06:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-02 20:06:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:01,222 INFO L225 Difference]: With dead ends: 112 [2022-11-02 20:06:01,223 INFO L226 Difference]: Without dead ends: 112 [2022-11-02 20:06:01,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=95, Invalid=322, Unknown=3, NotChecked=0, Total=420 [2022-11-02 20:06:01,224 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:01,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 266 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 379 Invalid, 0 Unknown, 91 Unchecked, 0.9s Time] [2022-11-02 20:06:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-02 20:06:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2022-11-02 20:06:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:06:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-11-02 20:06:01,233 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 15 [2022-11-02 20:06:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:01,234 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-11-02 20:06:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-11-02 20:06:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:06:01,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:01,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:01,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:01,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:01,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:01,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1183663415, now seen corresponding path program 1 times [2022-11-02 20:06:01,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:01,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835588083] [2022-11-02 20:06:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:01,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:01,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:01,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:06:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:01,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:06:01,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:01,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:01,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:01,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835588083] [2022-11-02 20:06:01,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835588083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:01,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:06:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477681025] [2022-11-02 20:06:01,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:01,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:06:01,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:01,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:06:01,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:06:01,581 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:01,622 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-11-02 20:06:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:06:01,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 20:06:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:01,629 INFO L225 Difference]: With dead ends: 98 [2022-11-02 20:06:01,629 INFO L226 Difference]: Without dead ends: 98 [2022-11-02 20:06:01,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:06:01,635 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 18 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:01,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 355 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:06:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-02 20:06:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2022-11-02 20:06:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 67 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-11-02 20:06:01,652 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 13 [2022-11-02 20:06:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:01,652 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-11-02 20:06:01,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-11-02 20:06:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:06:01,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:01,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:01,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:01,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1303849418, now seen corresponding path program 1 times [2022-11-02 20:06:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:01,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531735125] [2022-11-02 20:06:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:01,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:01,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:01,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:06:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:06:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:02,218 INFO L390 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 [2022-11-02 20:06:02,229 INFO L390 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 [2022-11-02 20:06:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:02,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:02,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531735125] [2022-11-02 20:06:02,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531735125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:02,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:02,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:06:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385908329] [2022-11-02 20:06:02,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:02,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:06:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:06:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:06:02,289 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:02,988 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-11-02 20:06:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:06:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 20:06:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:02,991 INFO L225 Difference]: With dead ends: 103 [2022-11-02 20:06:02,991 INFO L226 Difference]: Without dead ends: 103 [2022-11-02 20:06:02,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:06:02,992 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 35 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:02,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 218 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:06:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-02 20:06:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2022-11-02 20:06:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.52) internal successors, (76), 72 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-11-02 20:06:03,010 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 13 [2022-11-02 20:06:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:03,011 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-11-02 20:06:03,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-11-02 20:06:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:06:03,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:03,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:03,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:03,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:03,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1303849417, now seen corresponding path program 1 times [2022-11-02 20:06:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:03,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705849571] [2022-11-02 20:06:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:03,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:03,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:03,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:06:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:06:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:03,483 INFO L390 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 [2022-11-02 20:06:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:03,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:03,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:03,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705849571] [2022-11-02 20:06:03,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705849571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:03,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:03,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:06:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852735157] [2022-11-02 20:06:03,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:03,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:06:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:03,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:06:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:06:03,532 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:04,100 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-11-02 20:06:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:06:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 20:06:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:04,101 INFO L225 Difference]: With dead ends: 98 [2022-11-02 20:06:04,101 INFO L226 Difference]: Without dead ends: 98 [2022-11-02 20:06:04,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:06:04,102 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 38 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:04,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 169 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:06:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-02 20:06:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2022-11-02 20:06:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.5) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-11-02 20:06:04,108 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 13 [2022-11-02 20:06:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:04,108 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-11-02 20:06:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-11-02 20:06:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:06:04,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:04,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:04,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:04,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2031085508, now seen corresponding path program 1 times [2022-11-02 20:06:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:04,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373457710] [2022-11-02 20:06:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:04,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:04,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:04,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:04,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:06:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:06:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:04,406 INFO L390 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 7 [2022-11-02 20:06:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:04,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:04,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:04,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373457710] [2022-11-02 20:06:04,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373457710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:04,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:04,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:06:04,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143785384] [2022-11-02 20:06:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:04,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:06:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:06:04,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:06:04,513 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:05,231 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-11-02 20:06:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:06:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-02 20:06:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:05,233 INFO L225 Difference]: With dead ends: 120 [2022-11-02 20:06:05,233 INFO L226 Difference]: Without dead ends: 120 [2022-11-02 20:06:05,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:06:05,234 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:05,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 355 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:06:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-02 20:06:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2022-11-02 20:06:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 82 states have internal predecessors, (88), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:06:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2022-11-02 20:06:05,244 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 16 [2022-11-02 20:06:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:05,244 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2022-11-02 20:06:05,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2022-11-02 20:06:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:06:05,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:05,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:05,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-02 20:06:05,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:05,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2031085507, now seen corresponding path program 1 times [2022-11-02 20:06:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817590788] [2022-11-02 20:06:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:05,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:05,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:06:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:06:05,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:05,599 INFO L390 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 [2022-11-02 20:06:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:05,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:05,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817590788] [2022-11-02 20:06:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817590788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:05,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:05,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:06:05,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277159352] [2022-11-02 20:06:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:06:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:06:05,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:06:05,840 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:06,696 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-11-02 20:06:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:06:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-02 20:06:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:06,697 INFO L225 Difference]: With dead ends: 118 [2022-11-02 20:06:06,698 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 20:06:06,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:06:06,699 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 41 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:06,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 449 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:06:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 20:06:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-11-02 20:06:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 82 states have internal predecessors, (86), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:06:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-11-02 20:06:06,707 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 16 [2022-11-02 20:06:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:06,707 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-11-02 20:06:06,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-11-02 20:06:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:06:06,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:06,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:06,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:06,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:06,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1902002789, now seen corresponding path program 1 times [2022-11-02 20:06:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:06,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504759222] [2022-11-02 20:06:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:06,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:06,924 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:06,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:06:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:06:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:07,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:07,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504759222] [2022-11-02 20:06:07,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504759222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:07,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:07,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:06:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045209488] [2022-11-02 20:06:07,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:07,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:06:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:06:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:06:07,067 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:07,096 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-11-02 20:06:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:06:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-02 20:06:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:07,098 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:06:07,098 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:06:07,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:06:07,099 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:07,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 284 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:06:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:06:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-11-02 20:06:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.4) internal successors, (70), 68 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-11-02 20:06:07,105 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 16 [2022-11-02 20:06:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:07,106 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-11-02 20:06:07,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-11-02 20:06:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:06:07,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:07,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:07,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:07,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1958018817, now seen corresponding path program 1 times [2022-11-02 20:06:07,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:07,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903386209] [2022-11-02 20:06:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:07,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:07,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:06:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:06:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:07,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:07,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903386209] [2022-11-02 20:06:07,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903386209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:07,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:07,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:06:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728913184] [2022-11-02 20:06:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:07,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:06:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:06:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:06:07,515 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:07,735 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-11-02 20:06:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:06:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-02 20:06:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:07,737 INFO L225 Difference]: With dead ends: 79 [2022-11-02 20:06:07,737 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:06:07,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:06:07,739 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 12 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:07,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 179 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:06:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:06:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-02 20:06:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.38) internal successors, (69), 67 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-11-02 20:06:07,744 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 18 [2022-11-02 20:06:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:07,745 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-11-02 20:06:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-11-02 20:06:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:06:07,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:07,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:07,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:07,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:07,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1958018816, now seen corresponding path program 1 times [2022-11-02 20:06:07,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:07,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564741194] [2022-11-02 20:06:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:07,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:07,962 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:07,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:06:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:06:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:08,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:08,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564741194] [2022-11-02 20:06:08,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564741194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:08,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:08,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:06:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777067805] [2022-11-02 20:06:08,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:08,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:06:08,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:06:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:06:08,270 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:08,814 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-11-02 20:06:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:06:08,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-02 20:06:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:08,817 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:06:08,817 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:06:08,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:06:08,818 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:08,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 280 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:06:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:06:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-02 20:06:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.36) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-02 20:06:08,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 18 [2022-11-02 20:06:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:08,822 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-02 20:06:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-02 20:06:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:06:08,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:08,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:08,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 20:06:09,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:09,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1449226599, now seen corresponding path program 1 times [2022-11-02 20:06:09,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:09,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631360396] [2022-11-02 20:06:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:09,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:09,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:06:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:06:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:09,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:09,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:09,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631360396] [2022-11-02 20:06:09,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631360396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:09,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:09,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:06:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633024838] [2022-11-02 20:06:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:09,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:06:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:06:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:06:09,298 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:09,692 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-02 20:06:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:06:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-02 20:06:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:09,693 INFO L225 Difference]: With dead ends: 76 [2022-11-02 20:06:09,694 INFO L226 Difference]: Without dead ends: 76 [2022-11-02 20:06:09,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:06:09,694 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 94 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:09,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 82 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:06:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-02 20:06:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-02 20:06:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.32) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:06:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-11-02 20:06:09,699 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 19 [2022-11-02 20:06:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:09,699 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-11-02 20:06:09,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-11-02 20:06:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:06:09,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:09,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:09,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:09,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1449226600, now seen corresponding path program 1 times [2022-11-02 20:06:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893317483] [2022-11-02 20:06:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:09,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:09,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:09,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:06:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:06:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:10,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:10,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893317483] [2022-11-02 20:06:10,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893317483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:10,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:10,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:06:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410718082] [2022-11-02 20:06:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:06:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:06:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:06:10,258 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:10,742 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-11-02 20:06:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:06:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-02 20:06:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:10,744 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:06:10,744 INFO L226 Difference]: Without dead ends: 86 [2022-11-02 20:06:10,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:06:10,745 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 22 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:10,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 202 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:06:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-02 20:06:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-11-02 20:06:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.290909090909091) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 20:06:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-11-02 20:06:10,750 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 19 [2022-11-02 20:06:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:10,750 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-11-02 20:06:10,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:06:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-11-02 20:06:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:06:10,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:10,751 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:10,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:10,960 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 59862981, now seen corresponding path program 1 times [2022-11-02 20:06:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416685805] [2022-11-02 20:06:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:10,962 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:10,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:06:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:06:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:11,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:11,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416685805] [2022-11-02 20:06:11,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416685805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:11,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:11,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:06:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893330622] [2022-11-02 20:06:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:06:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:06:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:06:11,148 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:06:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:11,412 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-11-02 20:06:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:06:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-02 20:06:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:11,414 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:06:11,414 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 20:06:11,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:06:11,415 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:11,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 87 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:06:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 20:06:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-02 20:06:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 55 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:06:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-11-02 20:06:11,419 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 24 [2022-11-02 20:06:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:11,419 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-11-02 20:06:11,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:06:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-11-02 20:06:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:06:11,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:11,420 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:11,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:11,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:11,621 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash -929247957, now seen corresponding path program 1 times [2022-11-02 20:06:11,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:11,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008419022] [2022-11-02 20:06:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:11,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:11,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:11,623 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:11,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:06:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:11,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:06:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:11,775 INFO L390 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 [2022-11-02 20:06:12,168 INFO L390 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 [2022-11-02 20:06:12,178 INFO L390 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 [2022-11-02 20:06:12,468 INFO L390 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 [2022-11-02 20:06:12,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:06:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:12,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:12,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008419022] [2022-11-02 20:06:12,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008419022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:12,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:12,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 20:06:12,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474188927] [2022-11-02 20:06:12,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:12,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:06:12,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:06:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:06:12,599 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:12,869 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-11-02 20:06:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:06:12,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-02 20:06:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:12,871 INFO L225 Difference]: With dead ends: 69 [2022-11-02 20:06:12,871 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 20:06:12,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:06:12,872 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:12,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 206 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-11-02 20:06:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 20:06:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-11-02 20:06:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 54 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:06:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-11-02 20:06:12,876 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 27 [2022-11-02 20:06:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:12,877 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-11-02 20:06:12,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-11-02 20:06:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:06:12,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:12,878 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:12,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-02 20:06:13,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:13,079 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash -929247958, now seen corresponding path program 1 times [2022-11-02 20:06:13,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:13,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099772585] [2022-11-02 20:06:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:13,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:13,082 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:13,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:06:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:13,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:06:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:13,240 INFO L390 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 7 [2022-11-02 20:06:13,525 INFO L390 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 [2022-11-02 20:06:13,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:06:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:13,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:13,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:13,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099772585] [2022-11-02 20:06:13,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099772585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:13,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:13,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:06:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530602354] [2022-11-02 20:06:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:13,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:06:13,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:06:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:06:13,796 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:14,508 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2022-11-02 20:06:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:06:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-02 20:06:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:14,510 INFO L225 Difference]: With dead ends: 89 [2022-11-02 20:06:14,510 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 20:06:14,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:06:14,512 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:14,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 290 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 180 Invalid, 0 Unknown, 142 Unchecked, 0.4s Time] [2022-11-02 20:06:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 20:06:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-11-02 20:06:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 53 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:06:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-11-02 20:06:14,516 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 27 [2022-11-02 20:06:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:14,517 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-11-02 20:06:14,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-11-02 20:06:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:06:14,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:14,521 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:14,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:14,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:14,734 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1379353082, now seen corresponding path program 1 times [2022-11-02 20:06:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496425991] [2022-11-02 20:06:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:14,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:14,737 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:14,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:06:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:06:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:14,902 INFO L390 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 7 [2022-11-02 20:06:15,165 INFO L390 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 [2022-11-02 20:06:15,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:06:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:15,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:15,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496425991] [2022-11-02 20:06:15,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496425991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:15,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:15,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:06:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532787994] [2022-11-02 20:06:15,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:15,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:06:15,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:06:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:06:15,509 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:15,815 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2022-11-02 20:06:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:06:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-11-02 20:06:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:15,820 INFO L225 Difference]: With dead ends: 83 [2022-11-02 20:06:15,821 INFO L226 Difference]: Without dead ends: 83 [2022-11-02 20:06:15,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:06:15,822 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:15,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 212 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-11-02 20:06:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-02 20:06:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2022-11-02 20:06:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.4) internal successors, (70), 63 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-11-02 20:06:15,826 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 32 [2022-11-02 20:06:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-11-02 20:06:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-11-02 20:06:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:06:15,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:15,828 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:15,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:16,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:16,041 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1379353083, now seen corresponding path program 1 times [2022-11-02 20:06:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:16,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923322573] [2022-11-02 20:06:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:16,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:16,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:16,044 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:16,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:06:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:16,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:06:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:16,217 INFO L390 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 [2022-11-02 20:06:16,576 INFO L390 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 [2022-11-02 20:06:16,585 INFO L390 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 [2022-11-02 20:06:16,859 INFO L390 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 [2022-11-02 20:06:16,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:06:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:17,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:17,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923322573] [2022-11-02 20:06:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923322573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:17,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:17,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-02 20:06:17,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461810747] [2022-11-02 20:06:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:06:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:06:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:06:17,106 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:17,677 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-11-02 20:06:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:06:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-11-02 20:06:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:17,679 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:06:17,680 INFO L226 Difference]: Without dead ends: 81 [2022-11-02 20:06:17,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:06:17,681 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:17,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 288 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-11-02 20:06:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-02 20:06:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2022-11-02 20:06:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.36) internal successors, (68), 63 states have internal predecessors, (68), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-02 20:06:17,685 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 32 [2022-11-02 20:06:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:17,685 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-02 20:06:17,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-02 20:06:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:06:17,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:17,686 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:17,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:17,900 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash -193116151, now seen corresponding path program 1 times [2022-11-02 20:06:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:17,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226533490] [2022-11-02 20:06:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:17,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:17,903 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:17,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:06:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:06:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:18,168 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:06:18,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:06:18,452 INFO L390 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 [2022-11-02 20:06:18,625 INFO L390 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 16 treesize of output 8 [2022-11-02 20:06:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:18,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:18,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226533490] [2022-11-02 20:06:18,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226533490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:18,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:18,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:06:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176628213] [2022-11-02 20:06:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:18,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:06:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:06:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:06:18,709 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:20,305 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-11-02 20:06:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:06:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-11-02 20:06:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:20,307 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:06:20,307 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:06:20,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:06:20,308 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:20,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 116 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:06:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:06:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-11-02 20:06:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.34) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-02 20:06:20,312 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 33 [2022-11-02 20:06:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:20,312 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-02 20:06:20,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-02 20:06:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:06:20,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:20,313 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:20,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:20,526 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1939380463, now seen corresponding path program 1 times [2022-11-02 20:06:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:20,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847247461] [2022-11-02 20:06:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:20,528 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:20,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:06:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:06:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:20,847 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:06:20,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:06:20,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:06:21,318 INFO L390 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 [2022-11-02 20:06:21,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:06:21,545 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:06:21,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:06:21,559 INFO L390 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 [2022-11-02 20:06:21,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-11-02 20:06:22,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-02 20:06:22,555 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:06:22,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-11-02 20:06:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:22,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:22,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:22,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847247461] [2022-11-02 20:06:22,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847247461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:22,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:22,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:06:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591439759] [2022-11-02 20:06:22,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:22,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:06:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:06:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:06:22,681 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:23,699 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-11-02 20:06:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:06:23,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-11-02 20:06:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:23,704 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:06:23,704 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:06:23,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:06:23,706 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:23,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 423 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 287 Invalid, 0 Unknown, 238 Unchecked, 0.5s Time] [2022-11-02 20:06:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:06:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-11-02 20:06:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.32) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-02 20:06:23,711 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 35 [2022-11-02 20:06:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:23,711 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-02 20:06:23,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-02 20:06:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:06:23,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:23,713 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:23,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:23,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:23,927 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:23,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1939380462, now seen corresponding path program 1 times [2022-11-02 20:06:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:23,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87943235] [2022-11-02 20:06:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:23,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:23,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:23,930 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:23,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:06:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-02 20:06:24,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:24,336 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:06:24,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:06:24,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:06:24,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:06:25,056 INFO L390 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 [2022-11-02 20:06:25,072 INFO L390 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 [2022-11-02 20:06:25,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:06:25,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:06:25,406 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:06:25,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:06:25,487 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:06:25,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:06:26,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-11-02 20:06:26,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-02 20:06:26,975 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-02 20:06:26,976 INFO L390 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 69 treesize of output 36 [2022-11-02 20:06:26,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:06:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:27,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:27,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:27,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87943235] [2022-11-02 20:06:27,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87943235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:27,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:27,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-02 20:06:27,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524753450] [2022-11-02 20:06:27,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:27,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:06:27,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:06:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:06:27,149 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:31,680 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-11-02 20:06:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:06:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-11-02 20:06:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:31,684 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:06:31,684 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 20:06:31,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:06:31,685 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 87 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:31,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 420 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-02 20:06:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 20:06:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-11-02 20:06:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.3) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-11-02 20:06:31,689 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 35 [2022-11-02 20:06:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:31,690 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-11-02 20:06:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-11-02 20:06:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:06:31,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:31,691 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:31,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:31,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:31,899 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash 8747840, now seen corresponding path program 1 times [2022-11-02 20:06:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273458804] [2022-11-02 20:06:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:31,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:31,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:31,901 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:31,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:06:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:32,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:06:32,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:32,174 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:06:32,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:06:32,500 INFO L390 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 [2022-11-02 20:06:32,645 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-02 20:06:32,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:06:32,654 INFO L390 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 [2022-11-02 20:06:33,082 INFO L390 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 25 treesize of output 17 [2022-11-02 20:06:33,488 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-02 20:06:33,488 INFO L390 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 35 treesize of output 14 [2022-11-02 20:06:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:33,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:33,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:33,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273458804] [2022-11-02 20:06:33,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273458804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:33,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:33,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:06:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978295822] [2022-11-02 20:06:33,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:33,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:06:33,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:06:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=395, Unknown=3, NotChecked=0, Total=462 [2022-11-02 20:06:33,618 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:34,566 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-11-02 20:06:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:06:34,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-11-02 20:06:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:34,568 INFO L225 Difference]: With dead ends: 76 [2022-11-02 20:06:34,568 INFO L226 Difference]: Without dead ends: 76 [2022-11-02 20:06:34,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=746, Unknown=7, NotChecked=0, Total=870 [2022-11-02 20:06:34,570 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:34,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 369 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 218 Unchecked, 0.5s Time] [2022-11-02 20:06:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-02 20:06:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-02 20:06:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.28) internal successors, (64), 63 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-02 20:06:34,574 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 36 [2022-11-02 20:06:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:34,575 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-02 20:06:34,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-02 20:06:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:06:34,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:34,576 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:06:34,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:34,792 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash 8747841, now seen corresponding path program 1 times [2022-11-02 20:06:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626277215] [2022-11-02 20:06:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:34,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:34,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:34,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:06:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:06:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:35,110 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:06:35,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:06:35,539 INFO L390 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 [2022-11-02 20:06:35,558 INFO L390 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 [2022-11-02 20:06:37,140 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-02 20:06:37,140 INFO L390 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 44 treesize of output 44 [2022-11-02 20:06:37,203 INFO L356 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2022-11-02 20:06:37,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:06:38,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 38 [2022-11-02 20:06:38,369 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:06:38,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-11-02 20:06:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:38,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:38,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626277215] [2022-11-02 20:06:38,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626277215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:38,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:38,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-02 20:06:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820776353] [2022-11-02 20:06:38,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:38,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:06:38,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:06:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:06:38,539 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:45,369 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-11-02 20:06:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:06:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-11-02 20:06:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:45,371 INFO L225 Difference]: With dead ends: 75 [2022-11-02 20:06:45,371 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:06:45,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:06:45,372 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 139 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:45,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 162 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-02 20:06:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:06:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-02 20:06:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.26) internal successors, (63), 63 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-11-02 20:06:45,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 36 [2022-11-02 20:06:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:45,376 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-11-02 20:06:45,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:06:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-11-02 20:06:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:06:45,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:45,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:45,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:45,592 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash -555084404, now seen corresponding path program 1 times [2022-11-02 20:06:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:45,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596001332] [2022-11-02 20:06:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:45,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:45,595 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:45,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:06:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:06:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:45,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 20:06:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:45,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:45,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596001332] [2022-11-02 20:06:45,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596001332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:45,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:45,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:06:45,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076786] [2022-11-02 20:06:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:45,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:06:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:06:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:06:45,934 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:06:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:46,626 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-11-02 20:06:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:06:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-02 20:06:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:46,628 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:06:46,628 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:06:46,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:06:46,628 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:46,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 224 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:06:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:06:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-02 20:06:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-02 20:06:46,632 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 41 [2022-11-02 20:06:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:46,633 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-02 20:06:46,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:06:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-02 20:06:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:06:46,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:46,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:46,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-02 20:06:46,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:46,848 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash -555084403, now seen corresponding path program 1 times [2022-11-02 20:06:46,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923142891] [2022-11-02 20:06:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:46,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:46,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:46,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:06:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:47,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-02 20:06:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:47,281 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:06:47,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:06:47,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:06:47,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:06:47,762 INFO L390 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 [2022-11-02 20:06:47,788 INFO L390 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 [2022-11-02 20:06:47,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:06:47,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:06:48,000 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:06:48,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:06:48,058 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:06:48,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:06:48,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-11-02 20:06:48,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-11-02 20:06:49,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 49 [2022-11-02 20:06:49,555 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:06:49,556 INFO L390 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 46 treesize of output 21 [2022-11-02 20:06:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:49,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:06:49,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923142891] [2022-11-02 20:06:49,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923142891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:49,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:49,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-02 20:06:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017716129] [2022-11-02 20:06:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:06:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:06:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:06:49,675 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 26 states, 24 states have (on average 1.375) internal successors, (33), 21 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:06:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:54,394 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-11-02 20:06:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:06:54,395 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.375) internal successors, (33), 21 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-02 20:06:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:54,396 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:06:54,396 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:06:54,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:06:54,398 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 132 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:54,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 337 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-02 20:06:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:06:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-02 20:06:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.25) internal successors, (65), 64 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:06:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-11-02 20:06:54,402 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 41 [2022-11-02 20:06:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:54,402 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-11-02 20:06:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.375) internal successors, (33), 21 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:06:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-11-02 20:06:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:06:54,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:54,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:54,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-02 20:06:54,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:54,619 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:54,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1459271833, now seen corresponding path program 1 times [2022-11-02 20:06:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:54,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089865274] [2022-11-02 20:06:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:54,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:54,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:54,621 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:54,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:06:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:06:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:55,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 20:06:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:55,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:06:55,285 INFO L356 Elim1Store]: treesize reduction 7, result has 56.3 percent of original size [2022-11-02 20:06:55,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-02 20:06:55,322 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-02 20:06:55,323 INFO L390 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 [2022-11-02 20:06:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:55,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:06:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089865274] [2022-11-02 20:06:55,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089865274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:06:55,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:06:55,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-11-02 20:06:55,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3600669] [2022-11-02 20:06:55,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:06:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:06:55,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:06:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:06:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:06:55,444 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:06:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:06:56,695 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2022-11-02 20:06:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:06:56,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-11-02 20:06:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:06:56,697 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:06:56,697 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 20:06:56,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:06:56,698 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 77 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:06:56,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 333 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:06:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 20:06:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2022-11-02 20:06:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.25) internal successors, (70), 67 states have internal predecessors, (70), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:06:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-11-02 20:06:56,704 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 46 [2022-11-02 20:06:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:06:56,705 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-11-02 20:06:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:06:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-11-02 20:06:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:06:56,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:06:56,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:56,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:06:56,919 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:06:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1459271832, now seen corresponding path program 1 times [2022-11-02 20:06:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:06:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938396902] [2022-11-02 20:06:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:56,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:06:56,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:06:56,922 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:06:56,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 20:06:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:06:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:06:57,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-02 20:06:57,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2022-11-02 20:06:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:06:58,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:06:59,449 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:06:59,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2022-11-02 20:07:06,718 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:07:07,263 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:07:07,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 151 [2022-11-02 20:07:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:07:11,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:07:11,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938396902] [2022-11-02 20:07:11,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938396902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:07:11,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:07:11,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-02 20:07:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539871160] [2022-11-02 20:07:11,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:07:11,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:07:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:07:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:07:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:07:11,173 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:07:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:07:17,518 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-11-02 20:07:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:07:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2022-11-02 20:07:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:07:17,522 INFO L225 Difference]: With dead ends: 97 [2022-11-02 20:07:17,522 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 20:07:17,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:07:17,523 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:07:17,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 587 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 468 Invalid, 0 Unknown, 157 Unchecked, 3.1s Time] [2022-11-02 20:07:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 20:07:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-11-02 20:07:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 74 states have internal predecessors, (79), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:07:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-11-02 20:07:17,528 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 46 [2022-11-02 20:07:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:07:17,528 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-11-02 20:07:17,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:07:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-11-02 20:07:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:07:17,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:07:17,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:07:17,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:07:17,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:07:17,735 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:07:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:07:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2003824700, now seen corresponding path program 1 times [2022-11-02 20:07:17,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:07:17,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682465979] [2022-11-02 20:07:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:17,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:07:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:07:17,737 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:07:17,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:07:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:07:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:07:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:07:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:07:18,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:07:18,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:07:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682465979] [2022-11-02 20:07:18,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682465979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:07:18,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:07:18,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:07:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524992854] [2022-11-02 20:07:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:07:18,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:07:18,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:07:18,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:07:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:07:18,322 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:07:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:07:18,944 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-11-02 20:07:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:07:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2022-11-02 20:07:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:07:18,946 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:07:18,946 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 20:07:18,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:07:18,947 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:07:18,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:07:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 20:07:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-02 20:07:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 73 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:07:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-11-02 20:07:18,951 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 47 [2022-11-02 20:07:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:07:18,952 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-11-02 20:07:18,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:07:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-11-02 20:07:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:07:18,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:07:18,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:07:18,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:07:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:07:19,167 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:07:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:07:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1989023560, now seen corresponding path program 1 times [2022-11-02 20:07:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:07:19,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658438354] [2022-11-02 20:07:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:19,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:07:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:07:19,169 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:07:19,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 20:07:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:07:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:07:19,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:07:19,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:07:19,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:07:19,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-02 20:07:19,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:07:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:07:20,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:07:20,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:07:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658438354] [2022-11-02 20:07:20,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658438354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:07:20,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:07:20,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:07:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44292134] [2022-11-02 20:07:20,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:07:20,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:07:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:07:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:07:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:07:20,154 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:07:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:07:21,735 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-11-02 20:07:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:07:21,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-02 20:07:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:07:21,737 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:07:21,737 INFO L226 Difference]: Without dead ends: 86 [2022-11-02 20:07:21,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:07:21,738 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:07:21,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 245 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:07:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-02 20:07:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-02 20:07:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 72 states have internal predecessors, (77), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:07:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2022-11-02 20:07:21,741 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 48 [2022-11-02 20:07:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:07:21,742 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2022-11-02 20:07:21,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:07:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2022-11-02 20:07:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:07:21,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:07:21,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:07:21,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:07:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:07:21,951 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:07:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:07:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 491835012, now seen corresponding path program 1 times [2022-11-02 20:07:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:07:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20298622] [2022-11-02 20:07:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:21,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:07:21,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:07:21,954 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:07:21,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 20:07:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:07:22,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:07:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:07:22,511 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:07:22,511 INFO L390 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 [2022-11-02 20:07:22,532 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:07:22,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:07:22,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:07:23,121 INFO L390 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 [2022-11-02 20:07:23,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:07:23,388 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:07:23,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:07:23,404 INFO L390 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 [2022-11-02 20:07:23,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-11-02 20:07:23,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-02 20:07:24,242 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-02 20:07:24,243 INFO L390 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 35 treesize of output 14 [2022-11-02 20:07:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:07:25,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:07:27,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:07:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20298622] [2022-11-02 20:07:27,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20298622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:07:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933522091] [2022-11-02 20:07:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:27,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:07:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:07:27,237 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:07:27,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-02 20:07:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:07:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-02 20:07:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:07:28,094 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:07:28,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:07:28,116 INFO L390 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 [2022-11-02 20:07:28,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:07:29,302 INFO L390 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 [2022-11-02 20:07:29,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:07:29,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:07:29,666 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:07:29,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-02 20:07:29,703 INFO L390 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 [2022-11-02 20:07:30,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-11-02 20:07:30,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-11-02 20:07:31,701 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:07:31,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 11 [2022-11-02 20:07:32,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:07:32,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-11-02 20:07:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:07:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:07:37,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933522091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:07:37,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:07:37,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 45 [2022-11-02 20:07:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651291682] [2022-11-02 20:07:37,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:07:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:07:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:07:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:07:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2991, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:07:37,183 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 46 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 40 states have internal predecessors, (71), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:07:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:07:44,008 INFO L93 Difference]: Finished difference Result 56 states and 55 transitions. [2022-11-02 20:07:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:07:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 40 states have internal predecessors, (71), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2022-11-02 20:07:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:07:44,012 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:07:44,012 INFO L226 Difference]: Without dead ends: 53 [2022-11-02 20:07:44,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=372, Invalid=5480, Unknown=0, NotChecked=0, Total=5852 [2022-11-02 20:07:44,014 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:07:44,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 384 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1218 Invalid, 0 Unknown, 72 Unchecked, 3.2s Time] [2022-11-02 20:07:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-02 20:07:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-02 20:07:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:07:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 52 transitions. [2022-11-02 20:07:44,017 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 52 transitions. Word has length 49 [2022-11-02 20:07:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:07:44,018 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 52 transitions. [2022-11-02 20:07:44,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 40 states have internal predecessors, (71), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:07:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 52 transitions. [2022-11-02 20:07:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:07:44,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:07:44,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:07:44,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:07:44,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:07:44,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 20:07:44,431 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-02 20:07:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:07:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -945482383, now seen corresponding path program 1 times [2022-11-02 20:07:44,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:07:44,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857705035] [2022-11-02 20:07:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:44,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:07:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:07:44,437 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:07:44,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 20:07:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:07:44,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:07:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:07:44,893 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-02 20:07:44,894 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:07:44,895 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (28 of 29 remaining) [2022-11-02 20:07:44,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 29 remaining) [2022-11-02 20:07:44,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 29 remaining) [2022-11-02 20:07:44,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 29 remaining) [2022-11-02 20:07:44,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 29 remaining) [2022-11-02 20:07:44,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 29 remaining) [2022-11-02 20:07:44,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 29 remaining) [2022-11-02 20:07:44,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 29 remaining) [2022-11-02 20:07:44,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 29 remaining) [2022-11-02 20:07:44,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 29 remaining) [2022-11-02 20:07:44,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 29 remaining) [2022-11-02 20:07:44,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 29 remaining) [2022-11-02 20:07:44,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 29 remaining) [2022-11-02 20:07:44,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 29 remaining) [2022-11-02 20:07:44,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 29 remaining) [2022-11-02 20:07:44,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 29 remaining) [2022-11-02 20:07:44,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 29 remaining) [2022-11-02 20:07:44,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 29 remaining) [2022-11-02 20:07:44,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 29 remaining) [2022-11-02 20:07:44,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 29 remaining) [2022-11-02 20:07:44,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 29 remaining) [2022-11-02 20:07:44,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 29 remaining) [2022-11-02 20:07:44,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 29 remaining) [2022-11-02 20:07:44,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 29 remaining) [2022-11-02 20:07:44,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 29 remaining) [2022-11-02 20:07:44,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 29 remaining) [2022-11-02 20:07:44,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 29 remaining) [2022-11-02 20:07:44,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 29 remaining) [2022-11-02 20:07:44,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 29 remaining) [2022-11-02 20:07:44,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:07:45,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:07:45,121 INFO L444 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] [2022-11-02 20:07:45,126 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:07:45,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:07:45 BoogieIcfgContainer [2022-11-02 20:07:45,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:07:45,208 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:07:45,208 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:07:45,208 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:07:45,209 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:05:42" (3/4) ... [2022-11-02 20:07:45,212 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:07:45,212 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:07:45,213 INFO L158 Benchmark]: Toolchain (without parser) took 125006.35ms. Allocated memory was 65.0MB in the beginning and 104.9MB in the end (delta: 39.8MB). Free memory was 42.4MB in the beginning and 34.3MB in the end (delta: 8.1MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. [2022-11-02 20:07:45,213 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:07:45,214 INFO L158 Benchmark]: CACSL2BoogieTranslator took 909.43ms. Allocated memory is still 65.0MB. Free memory was 42.1MB in the beginning and 29.5MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-02 20:07:45,214 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.20ms. Allocated memory is still 65.0MB. Free memory was 29.5MB in the beginning and 27.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:07:45,214 INFO L158 Benchmark]: Boogie Preprocessor took 76.43ms. Allocated memory was 65.0MB in the beginning and 86.0MB in the end (delta: 21.0MB). Free memory was 27.1MB in the beginning and 67.9MB in the end (delta: -40.7MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2022-11-02 20:07:45,215 INFO L158 Benchmark]: RCFGBuilder took 748.43ms. Allocated memory is still 86.0MB. Free memory was 67.9MB in the beginning and 45.8MB in the end (delta: 22.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-02 20:07:45,215 INFO L158 Benchmark]: TraceAbstraction took 123170.68ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 45.2MB in the beginning and 34.3MB in the end (delta: 10.9MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2022-11-02 20:07:45,215 INFO L158 Benchmark]: Witness Printer took 4.91ms. Allocated memory is still 104.9MB. Free memory is still 34.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:07:45,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 909.43ms. Allocated memory is still 65.0MB. Free memory was 42.1MB in the beginning and 29.5MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.20ms. Allocated memory is still 65.0MB. Free memory was 29.5MB in the beginning and 27.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.43ms. Allocated memory was 65.0MB in the beginning and 86.0MB in the end (delta: 21.0MB). Free memory was 27.1MB in the beginning and 67.9MB in the end (delta: -40.7MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * RCFGBuilder took 748.43ms. Allocated memory is still 86.0MB. Free memory was 67.9MB in the beginning and 45.8MB in the end (delta: 22.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 123170.68ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 45.2MB in the beginning and 34.3MB in the end (delta: 10.9MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. * Witness Printer took 4.91ms. Allocated memory is still 104.9MB. Free memory is still 34.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 780]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 780. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L757] struct ldv_list_head global_list_13 = { &(global_list_13), &(global_list_13) }; VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L781] CALL entry_point() [L776] CALL alloc_13() [L763] CALL, EXPR ldv_malloc(sizeof(struct A13)) VAL [\old(size)=12, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L763] RET, EXPR ldv_malloc(sizeof(struct A13)) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct A13))={6:0}] [L763] struct A13 *p = (struct A13 *)ldv_malloc(sizeof(struct A13)); [L764] COND TRUE \read(*p) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L765] CALL ldv_list_add(&p->list, &global_list_13) VAL [global_list_13={2:0}, head={2:0}, ldv_global_msg_list={1:0}, new={6:4}] [L559] EXPR head->next VAL [global_list_13={2:0}, head={2:0}, head={2:0}, head->next={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}] [L559] CALL __ldv_list_add(new, head, head->next) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, next={2:0}, prev={2:0}] [L547] next->prev = new VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L548] new->next = next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L549] new->prev = prev VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L550] prev->next = new VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L559] RET __ldv_list_add(new, head, head->next) VAL [global_list_13={2:0}, head={2:0}, head={2:0}, head->next={2:0}, ldv_global_msg_list={1:0}, new={6:4}, new={6:4}] [L765] RET ldv_list_add(&p->list, &global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L776] RET alloc_13() [L777] CALL free_unsafe_13() [L769] struct A13 *p; [L770] struct A13 *n; VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] EXPR (&global_list_13)->next VAL [(&global_list_13)->next={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); [L771] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [__mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L771] EXPR (p)->list.next VAL [(p)->list.next={2:0}, __mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, p={6:0}] [L771] const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); [L771] n = ({ const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );}) VAL [__mptr={2:0}, __mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={6:0}] [L771] COND TRUE &p->list != (&global_list_13) VAL [__mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={6:0}] [L772] CALL ldv_list_del(&p->list) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->prev VAL [entry={6:4}, entry={6:4}, entry->prev={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->next VAL [entry={6:4}, entry={6:4}, entry->next={2:0}, entry->prev={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] CALL __ldv_list_del(entry->prev, entry->next) [L554] next->prev = prev VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L555] prev->next = next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, next={2:0}, next={2:0}, prev={2:0}, prev={2:0}] [L567] RET __ldv_list_del(entry->prev, entry->next) [L772] RET ldv_list_del(&p->list) VAL [__mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={6:0}] [L771] p = n VAL [__mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] EXPR (n)->list.next VAL [(n)->list.next={2:0}, __mptr={6:4}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); [L771] n = ({ const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );}) VAL [__mptr={2:0}, __mptr={2:0}, __mptr={6:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] COND FALSE !(&p->list != (&global_list_13)) VAL [__mptr={6:4}, __mptr={2:0}, __mptr={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L777] RET free_unsafe_13() [L778] CALL LDV_INIT_LIST_HEAD(&global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}] [L540] list->next = list VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}, list={2:0}] [L541] list->prev = list VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}, list={2:0}] [L778] RET LDV_INIT_LIST_HEAD(&global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L781] RET entry_point() - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 82 locations, 29 error locations. Started 1 CEGAR loops. OverallTime: 123.0s, OverallIterations: 32, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 55.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2033 SdHoareTripleChecker+Valid, 26.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2000 mSDsluCounter, 8199 SdHoareTripleChecker+Invalid, 22.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1305 IncrementalHoareTripleChecker+Unchecked, 6676 mSDsCounter, 395 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9659 IncrementalHoareTripleChecker+Invalid, 11359 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 395 mSolverCounterUnsat, 1523 mSDtfsCounter, 9659 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1194 GetRequests, 619 SyntacticMatches, 5 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3047 ImplicationChecksByTransitivity, 65.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=8, InterpolantAutomatonStates: 421, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 31 MinimizatonAttempts, 257 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 54.4s InterpolantComputationTime, 951 NumberOfCodeBlocks, 951 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 957 ConstructedInterpolants, 100 QuantifiedInterpolants, 14801 SizeOfPredicates, 383 NumberOfNonLiveVariables, 4833 ConjunctsInSsa, 842 ConjunctsInUnsatCore, 34 InterpolantComputations, 28 PerfectInterpolantSequences, 7/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 20:07:45,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd61c3b9-15c2-4984-bfa0-2b846a83afe1/bin/uautomizer-Dbtcem3rbc/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 Result: UNKNOWN: Overapproximated counterexample