./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:29:38,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:29:38,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:29:38,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:29:38,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:29:38,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:29:38,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:29:38,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:29:38,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:29:38,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:29:38,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:29:38,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:29:38,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:29:38,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:29:38,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:29:38,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:29:38,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:29:38,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:29:38,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:29:38,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:29:38,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:29:38,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:29:38,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:29:38,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:29:38,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:29:38,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:29:38,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:29:38,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:29:38,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:29:38,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:29:38,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:29:38,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:29:38,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:29:38,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:29:38,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:29:38,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:29:38,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:29:38,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:29:38,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:29:38,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:29:38,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:29:38,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:29:38,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:29:38,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:29:38,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:29:38,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:29:38,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:29:38,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:29:38,246 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:29:38,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:29:38,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:29:38,247 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:29:38,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:29:38,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:29:38,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:29:38,247 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:29:38,247 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:29:38,248 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:29:38,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:29:38,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:29:38,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:29:38,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:29:38,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:29:38,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:29:38,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:29:38,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:29:38,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:29:38,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:29:38,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:29:38,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:29:38,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:29:38,250 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_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2021-11-02 22:29:38,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:29:38,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:29:38,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:29:38,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:29:38,538 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:29:38,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-02 22:29:38,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/69271ce33/bae82a9f5adb463f840d84df7c16f0e3/FLAGd80c6823d [2021-11-02 22:29:39,162 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:29:39,163 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-02 22:29:39,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/69271ce33/bae82a9f5adb463f840d84df7c16f0e3/FLAGd80c6823d [2021-11-02 22:29:39,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/69271ce33/bae82a9f5adb463f840d84df7c16f0e3 [2021-11-02 22:29:39,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:29:39,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:29:39,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:29:39,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:29:39,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:29:39,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:29:39" (1/1) ... [2021-11-02 22:29:39,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64388103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:39, skipping insertion in model container [2021-11-02 22:29:39,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:29:39" (1/1) ... [2021-11-02 22:29:39,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:29:39,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:29:39,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:29:39,973 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-02 22:29:39,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59b6ed62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:39, skipping insertion in model container [2021-11-02 22:29:39,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:29:39,976 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-02 22:29:39,979 INFO L168 Benchmark]: Toolchain (without parser) took 551.10 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 54.7 MB in the beginning and 95.8 MB in the end (delta: -41.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:29:39,981 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 73.1 MB in the end (delta: 66.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:29:39,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 548.15 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 54.5 MB in the beginning and 96.6 MB in the end (delta: -42.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-11-02 22:29:39,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 73.1 MB in the end (delta: 66.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 548.15 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 54.5 MB in the beginning and 96.6 MB in the end (delta: -42.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:29:42,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:29:42,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:29:42,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:29:42,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:29:42,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:29:42,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:29:42,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:29:42,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:29:42,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:29:42,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:29:42,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:29:42,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:29:42,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:29:42,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:29:42,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:29:42,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:29:42,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:29:42,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:29:42,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:29:42,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:29:42,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:29:42,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:29:42,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:29:42,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:29:42,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:29:42,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:29:42,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:29:42,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:29:42,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:29:42,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:29:42,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:29:42,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:29:42,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:29:42,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:29:42,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:29:42,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:29:42,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:29:42,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:29:42,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:29:42,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:29:42,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:29:42,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:29:42,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:29:42,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:29:42,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:29:42,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:29:42,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:29:42,357 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:29:42,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:29:42,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:29:42,359 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:29:42,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:29:42,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:29:42,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:29:42,361 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:29:42,361 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:29:42,361 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:29:42,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:29:42,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:29:42,362 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:29:42,362 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:29:42,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:29:42,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:29:42,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:29:42,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:29:42,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:29:42,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:29:42,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:29:42,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:29:42,364 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:29:42,364 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:29:42,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:29:42,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:29:42,365 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_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2021-11-02 22:29:42,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:29:42,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:29:42,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:29:42,820 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:29:42,820 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:29:42,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-02 22:29:42,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/67252bc21/bde9c6ed8c414425a5e7c26df411894c/FLAG9fb85fa1d [2021-11-02 22:29:43,618 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:29:43,619 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-02 22:29:43,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/67252bc21/bde9c6ed8c414425a5e7c26df411894c/FLAG9fb85fa1d [2021-11-02 22:29:43,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/data/67252bc21/bde9c6ed8c414425a5e7c26df411894c [2021-11-02 22:29:43,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:29:43,821 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:29:43,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:29:43,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:29:43,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:29:43,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:29:43" (1/1) ... [2021-11-02 22:29:43,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@257e1d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:43, skipping insertion in model container [2021-11-02 22:29:43,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:29:43" (1/1) ... [2021-11-02 22:29:43,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:29:43,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:29:44,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:29:44,426 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-02 22:29:44,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:29:44,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:29:44,538 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:29:44,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:29:44,682 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:29:44,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44 WrapperNode [2021-11-02 22:29:44,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:29:44,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:29:44,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:29:44,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:29:44,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:29:44,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:29:44,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:29:44,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:29:44,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (1/1) ... [2021-11-02 22:29:44,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:29:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:44,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:29:44,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:29:44,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:29:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:29:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:29:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:29:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:29:44,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:29:44,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:29:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:29:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:29:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive [2021-11-02 22:29:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_positive [2021-11-02 22:29:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-02 22:29:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-02 22:29:44,903 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-11-02 22:29:44,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-02 22:29:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_del [2021-11-02 22:29:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-11-02 22:29:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add_tail [2021-11-02 22:29:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-11-02 22:29:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_alloc [2021-11-02 22:29:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_fill [2021-11-02 22:29:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2021-11-02 22:29:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_msg [2021-11-02 22:29:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_destroy_msgs [2021-11-02 22:29:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_get_drvdata [2021-11-02 22:29:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-02 22:29:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_atomic_add_return [2021-11-02 22:29:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_atomic_sub_return [2021-11-02 22:29:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_sub [2021-11-02 22:29:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_init [2021-11-02 22:29:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_get [2021-11-02 22:29:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put [2021-11-02 22:29:44,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_del [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_cleanup [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_release [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_get [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init_internal [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init [2021-11-02 22:29:44,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_create [2021-11-02 22:29:44,908 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-02 22:29:44,908 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-11-02 22:29:44,908 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_13 [2021-11-02 22:29:44,909 INFO L138 BoogieDeclarations]: Found implementation of procedure free_unsafe_13 [2021-11-02 22:29:44,909 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2021-11-02 22:29:44,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:29:44,909 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-02 22:29:44,910 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-02 22:29:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-02 22:29:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:29:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:29:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:29:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:29:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:29:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:29:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:29:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:29:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:29:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:29:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:29:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:29:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:29:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:29:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:29:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:29:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:29:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:29:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:29:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:29:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:29:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:29:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:29:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:29:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:29:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:29:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:29:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:29:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:29:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:29:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:29:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:29:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:29:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:29:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:29:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:29:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:29:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:29:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:29:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:29:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:29:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:29:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:29:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:29:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:29:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:29:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:29:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:29:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:29:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:29:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:29:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:29:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:29:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:29:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:29:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:29:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:29:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:29:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:29:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:29:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:29:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:29:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:29:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:29:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:29:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:29:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:29:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:29:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:29:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:29:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:29:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:29:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:29:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:29:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_positive [2021-11-02 22:29:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-11-02 22:29:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_del [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add_tail [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-11-02 22:29:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_alloc [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_fill [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_msg [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_destroy_msgs [2021-11-02 22:29:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_get_drvdata [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_atomic_add_return [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_atomic_sub_return [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_sub [2021-11-02 22:29:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_init [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_get [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_del [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_cleanup [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_release [2021-11-02 22:29:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_get [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init_internal [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_create [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-02 22:29:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-11-02 22:29:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_13 [2021-11-02 22:29:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure free_unsafe_13 [2021-11-02 22:29:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2021-11-02 22:29:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:29:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:29:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-02 22:29:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-02 22:29:45,574 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:29:45,969 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:29:46,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:29:46,255 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-02 22:29:46,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:29:46 BoogieIcfgContainer [2021-11-02 22:29:46,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:29:46,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:29:46,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:29:46,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:29:46,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:29:43" (1/3) ... [2021-11-02 22:29:46,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6899d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:29:46, skipping insertion in model container [2021-11-02 22:29:46,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:29:44" (2/3) ... [2021-11-02 22:29:46,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6899d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:29:46, skipping insertion in model container [2021-11-02 22:29:46,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:29:46" (3/3) ... [2021-11-02 22:29:46,267 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test13_2.i [2021-11-02 22:29:46,273 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:29:46,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2021-11-02 22:29:46,313 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:29:46,322 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:29:46,322 INFO L340 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2021-11-02 22:29:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 153 states have internal predecessors, (163), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:29:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:29:46,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:46,366 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:46,366 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:29:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash 974207510, now seen corresponding path program 1 times [2021-11-02 22:29:46,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:29:46,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965757103] [2021-11-02 22:29:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:46,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:29:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:29:46,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:29:46,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:29:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:29:46,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:46,726 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:29:46,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-02 22:29:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-02 22:29:47,009 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 22:29:47,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-02 22:29:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:47,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:29:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:47,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:29:47,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965757103] [2021-11-02 22:29:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965757103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:47,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:47,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-11-02 22:29:47,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710919008] [2021-11-02 22:29:47,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:29:47,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:29:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:29:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:29:47,417 INFO L87 Difference]: Start difference. First operand has 192 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 153 states have internal predecessors, (163), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:29:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:48,169 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-11-02 22:29:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:29:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-11-02 22:29:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:48,181 INFO L225 Difference]: With dead ends: 106 [2021-11-02 22:29:48,181 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 22:29:48,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:29:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 22:29:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-02 22:29:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 76 states have internal predecessors, (77), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-02 22:29:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-11-02 22:29:48,228 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 17 [2021-11-02 22:29:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:48,228 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-11-02 22:29:48,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:29:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-11-02 22:29:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:29:48,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:48,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:48,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:48,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:29:48,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:29:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:48,455 INFO L85 PathProgramCache]: Analyzing trace with hash 974207511, now seen corresponding path program 1 times [2021-11-02 22:29:48,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:29:48,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650582564] [2021-11-02 22:29:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:48,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:29:48,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:29:48,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:29:48,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:29:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:48,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:29:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:48,718 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:29:48,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 35 [2021-11-02 22:29:48,737 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:29:48,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-02 22:29:49,411 INFO L354 Elim1Store]: treesize reduction 2, result has 92.0 percent of original size [2021-11-02 22:29:49,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 56 [2021-11-02 22:29:49,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:29:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 52 [2021-11-02 22:29:51,793 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:29:51,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 61 [2021-11-02 22:29:51,851 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-11-02 22:29:51,851 INFO L388 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 50 treesize of output 72 [2021-11-02 22:29:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:52,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:08,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:08,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650582564] [2021-11-02 22:30:08,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650582564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:08,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:08,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-02 22:30:08,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766641766] [2021-11-02 22:30:08,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:30:08,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:30:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=139, Unknown=5, NotChecked=0, Total=182 [2021-11-02 22:30:08,609 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:31:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:22,467 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-02 22:31:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:31:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 17 [2021-11-02 22:31:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:22,473 INFO L225 Difference]: With dead ends: 98 [2021-11-02 22:31:22,473 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 22:31:22,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=83, Invalid=218, Unknown=5, NotChecked=0, Total=306 [2021-11-02 22:31:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 22:31:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-02 22:31:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 74 states have internal predecessors, (75), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-02 22:31:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2021-11-02 22:31:22,486 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 17 [2021-11-02 22:31:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:22,487 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2021-11-02 22:31:22,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:31:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2021-11-02 22:31:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:31:22,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:22,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:22,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:22,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:31:22,690 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __ldv_list_addErr0REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:31:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1522301663, now seen corresponding path program 1 times [2021-11-02 22:31:22,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:31:22,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363566838] [2021-11-02 22:31:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:22,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:31:22,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:31:22,693 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:31:22,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:31:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:22,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:31:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:23,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-02 22:31:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:23,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:31:23,270 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-02 22:31:23,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:31:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:23,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:31:23,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363566838] [2021-11-02 22:31:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363566838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:23,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:23,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-02 22:31:23,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461453178] [2021-11-02 22:31:23,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:31:23,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:31:23,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:31:23,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:31:23,405 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:31:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:24,161 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2021-11-02 22:31:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:31:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-02 22:31:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:24,165 INFO L225 Difference]: With dead ends: 141 [2021-11-02 22:31:24,165 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:31:24,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:31:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:31:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2021-11-02 22:31:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 47 states have (on average 1.574468085106383) internal successors, (74), 73 states have internal predecessors, (74), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-02 22:31:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-11-02 22:31:24,179 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 20 [2021-11-02 22:31:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-11-02 22:31:24,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:31:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-11-02 22:31:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:31:24,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:24,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:24,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:31:24,394 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __ldv_list_addErr1REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:31:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1522301664, now seen corresponding path program 1 times [2021-11-02 22:31:24,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:31:24,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618441535] [2021-11-02 22:31:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:24,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:31:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:31:24,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:31:24,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:31:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 22:31:24,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:24,717 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:31:24,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-02 22:31:24,784 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:31:24,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 36 [2021-11-02 22:31:25,605 INFO L354 Elim1Store]: treesize reduction 2, result has 92.0 percent of original size [2021-11-02 22:31:25,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 54 [2021-11-02 22:31:25,617 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:31:25,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2021-11-02 22:31:28,025 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:31:28,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-02 22:31:28,102 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-11-02 22:31:28,103 INFO L388 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 49 treesize of output 71 [2021-11-02 22:31:28,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-02 22:31:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-02 22:31:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:28,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:31:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:39,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:31:39,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618441535] [2021-11-02 22:31:39,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618441535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:39,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:39,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-02 22:31:39,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053869748] [2021-11-02 22:31:39,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:31:39,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:31:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:31:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=323, Unknown=4, NotChecked=0, Total=380 [2021-11-02 22:31:39,826 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:32:36,574 WARN L207 SmtUtils]: Spent 10.30 s on a formula simplification that was a NOOP. DAG size: 67 [2021-11-02 22:33:37,499 WARN L207 SmtUtils]: Spent 8.38 s on a formula simplification that was a NOOP. DAG size: 56 [2021-11-02 22:34:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:35,140 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2021-11-02 22:34:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:34:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2021-11-02 22:34:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:35,144 INFO L225 Difference]: With dead ends: 142 [2021-11-02 22:34:35,144 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 22:34:35,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=208, Invalid=837, Unknown=11, NotChecked=0, Total=1056 [2021-11-02 22:34:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 22:34:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2021-11-02 22:34:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.553191489361702) internal successors, (73), 72 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-02 22:34:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-11-02 22:34:35,157 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 20 [2021-11-02 22:34:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:35,158 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-11-02 22:34:35,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:34:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-11-02 22:34:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:34:35,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:35,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:35,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:35,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:35,371 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __ldv_list_addErr2REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash -53288634, now seen corresponding path program 1 times [2021-11-02 22:34:35,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:35,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401236398] [2021-11-02 22:34:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:35,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:35,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:35,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:34:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:34:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:35,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:34:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:35,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:36,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:36,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401236398] [2021-11-02 22:34:36,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401236398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:36,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:36,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-02 22:34:36,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594487899] [2021-11-02 22:34:36,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:34:36,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:34:36,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:34:36,045 INFO L87 Difference]: Start difference. First operand 96 states and 101 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:34:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:36,700 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-11-02 22:34:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:34:36,701 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-02 22:34:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:36,703 INFO L225 Difference]: With dead ends: 112 [2021-11-02 22:34:36,703 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 22:34:36,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:34:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 22:34:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2021-11-02 22:34:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 81 states have internal predecessors, (86), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-02 22:34:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2021-11-02 22:34:36,712 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 21 [2021-11-02 22:34:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:36,712 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2021-11-02 22:34:36,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:34:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2021-11-02 22:34:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:34:36,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:36,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:36,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-02 22:34:36,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:36,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __ldv_list_addErr3REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash -53288633, now seen corresponding path program 1 times [2021-11-02 22:34:36,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:36,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583911804] [2021-11-02 22:34:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:36,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:36,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:36,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:34:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:34:37,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:34:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:37,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:38,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:38,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583911804] [2021-11-02 22:34:38,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583911804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:38,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:38,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-02 22:34:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608632968] [2021-11-02 22:34:38,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:34:38,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:34:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:34:38,684 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:34:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:40,708 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-11-02 22:34:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:34:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-02 22:34:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:40,710 INFO L225 Difference]: With dead ends: 110 [2021-11-02 22:34:40,710 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 22:34:40,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:34:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 22:34:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-11-02 22:34:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 81 states have internal predecessors, (84), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-02 22:34:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-11-02 22:34:40,719 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 21 [2021-11-02 22:34:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:40,719 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-11-02 22:34:40,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:34:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-11-02 22:34:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:34:40,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:40,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:40,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:40,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:40,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __ldv_list_addErr2REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash 75794085, now seen corresponding path program 1 times [2021-11-02 22:34:40,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:40,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381954040] [2021-11-02 22:34:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:40,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:40,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:40,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:34:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:34:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:41,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:41,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:41,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381954040] [2021-11-02 22:34:41,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381954040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:41,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:41,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:34:41,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058898038] [2021-11-02 22:34:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:34:41,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:34:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:34:41,490 INFO L87 Difference]: Start difference. First operand 108 states and 114 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:34:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:41,509 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-11-02 22:34:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:34:41,510 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-02 22:34:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:41,511 INFO L225 Difference]: With dead ends: 93 [2021-11-02 22:34:41,512 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 22:34:41,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:34:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 22:34:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-11-02 22:34:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.446808510638298) internal successors, (68), 67 states have internal predecessors, (68), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-02 22:34:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-11-02 22:34:41,519 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 21 [2021-11-02 22:34:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:41,519 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-11-02 22:34:41,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:34:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-11-02 22:34:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:34:41,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:41,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:41,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:41,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:41,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting free_unsafe_13Err2REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1807359509, now seen corresponding path program 1 times [2021-11-02 22:34:41,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:41,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127257097] [2021-11-02 22:34:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:41,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:41,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:41,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:34:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:34:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:42,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:42,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:42,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127257097] [2021-11-02 22:34:42,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127257097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:42,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:42,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:34:42,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348153061] [2021-11-02 22:34:42,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:34:42,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:34:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:34:42,245 INFO L87 Difference]: Start difference. First operand 91 states and 94 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, (6), 2 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:34:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:42,270 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-11-02 22:34:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:34:42,271 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, (6), 2 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-02 22:34:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:42,273 INFO L225 Difference]: With dead ends: 91 [2021-11-02 22:34:42,273 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 22:34:42,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:34:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 22:34:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-02 22:34:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.425531914893617) internal successors, (67), 66 states have internal predecessors, (67), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-02 22:34:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-11-02 22:34:42,279 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 21 [2021-11-02 22:34:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:42,280 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-11-02 22:34:42,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:34:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-11-02 22:34:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:34:42,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:42,281 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:42,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:42,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:42,499 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting free_unsafe_13Err2REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1936442228, now seen corresponding path program 1 times [2021-11-02 22:34:42,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:42,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238559873] [2021-11-02 22:34:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:42,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:42,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:42,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:42,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:34:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:34:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:42,851 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:34:42,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-02 22:34:42,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:34:43,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-02 22:34:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-02 22:34:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:43,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:34:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:43,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238559873] [2021-11-02 22:34:43,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238559873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:43,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:43,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-02 22:34:43,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267274534] [2021-11-02 22:34:43,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:34:43,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:34:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:34:43,786 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:34:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:45,220 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-11-02 22:34:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:34:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 21 [2021-11-02 22:34:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:45,223 INFO L225 Difference]: With dead ends: 128 [2021-11-02 22:34:45,223 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 22:34:45,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:34:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 22:34:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-11-02 22:34:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 78 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-02 22:34:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-11-02 22:34:45,232 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 21 [2021-11-02 22:34:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:45,232 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-11-02 22:34:45,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:34:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-11-02 22:34:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:34:45,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:45,234 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:45,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:45,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:45,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting free_unsafe_13Err3REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1936442229, now seen corresponding path program 1 times [2021-11-02 22:34:45,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:45,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856118988] [2021-11-02 22:34:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:45,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:45,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:45,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:34:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:34:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:45,767 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:34:45,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-02 22:34:45,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-02 22:34:45,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:34:45,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:34:46,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-02 22:34:46,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-02 22:34:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:46,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:47,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-02 22:34:47,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-02 22:34:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:47,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:47,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856118988] [2021-11-02 22:34:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856118988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:47,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:47,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-02 22:34:47,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124316124] [2021-11-02 22:34:47,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:34:47,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:34:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:34:47,469 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:34:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:51,070 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2021-11-02 22:34:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:34:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 21 [2021-11-02 22:34:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:51,073 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:34:51,073 INFO L226 Difference]: Without dead ends: 162 [2021-11-02 22:34:51,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:34:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-02 22:34:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 118. [2021-11-02 22:34:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 87 states have internal predecessors, (103), 15 states have call successors, (15), 15 states have call predecessors, (15), 15 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-02 22:34:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2021-11-02 22:34:51,083 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 21 [2021-11-02 22:34:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:51,083 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2021-11-02 22:34:51,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:34:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2021-11-02 22:34:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:34:51,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:51,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:51,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:51,299 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr6REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 329232585, now seen corresponding path program 1 times [2021-11-02 22:34:51,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:51,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820450457] [2021-11-02 22:34:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:51,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:51,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:51,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:51,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:34:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:34:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:51,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:51,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:51,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820450457] [2021-11-02 22:34:51,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820450457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:51,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:51,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:34:51,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813361804] [2021-11-02 22:34:51,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:34:51,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:34:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:34:51,904 INFO L87 Difference]: Start difference. First operand 118 states and 133 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:34:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:52,157 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2021-11-02 22:34:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:34:52,167 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-02 22:34:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:52,169 INFO L225 Difference]: With dead ends: 117 [2021-11-02 22:34:52,169 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 22:34:52,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:34:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 22:34:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-02 22:34:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 86 states have internal predecessors, (102), 15 states have call successors, (15), 15 states have call predecessors, (15), 15 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-02 22:34:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2021-11-02 22:34:52,176 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 23 [2021-11-02 22:34:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:52,177 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2021-11-02 22:34:52,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:34:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2021-11-02 22:34:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:34:52,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:52,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:52,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-02 22:34:52,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:52,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr7REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash 329232586, now seen corresponding path program 1 times [2021-11-02 22:34:52,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:52,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266098103] [2021-11-02 22:34:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:52,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:52,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:52,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:34:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:34:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:53,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-02 22:34:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:53,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:53,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266098103] [2021-11-02 22:34:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266098103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:53,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:53,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-02 22:34:53,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793794158] [2021-11-02 22:34:53,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:34:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:34:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:34:53,653 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:34:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:54,776 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2021-11-02 22:34:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:34:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2021-11-02 22:34:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:54,778 INFO L225 Difference]: With dead ends: 116 [2021-11-02 22:34:54,779 INFO L226 Difference]: Without dead ends: 116 [2021-11-02 22:34:54,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:34:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-02 22:34:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-02 22:34:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 69 states have (on average 1.463768115942029) internal successors, (101), 85 states have internal predecessors, (101), 15 states have call successors, (15), 15 states have call predecessors, (15), 15 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-02 22:34:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2021-11-02 22:34:54,785 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 23 [2021-11-02 22:34:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:54,785 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2021-11-02 22:34:54,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:34:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2021-11-02 22:34:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:34:54,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:54,786 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:54,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-02 22:34:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:54,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2034385481, now seen corresponding path program 1 times [2021-11-02 22:34:55,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:55,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760798473] [2021-11-02 22:34:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:55,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:55,002 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:55,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:34:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:34:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:34:55,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:34:55,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 22:34:55,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 22:34:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:55,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:56,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:56,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760798473] [2021-11-02 22:34:56,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760798473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:56,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:56,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-02 22:34:56,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957078255] [2021-11-02 22:34:56,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:34:56,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:34:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:34:56,466 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:34:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:57,133 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-02 22:34:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:34:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-11-02 22:34:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:57,136 INFO L225 Difference]: With dead ends: 108 [2021-11-02 22:34:57,136 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 22:34:57,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:34:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 22:34:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-11-02 22:34:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.368421052631579) internal successors, (78), 73 states have internal predecessors, (78), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-02 22:34:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-11-02 22:34:57,142 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 26 [2021-11-02 22:34:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:57,143 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-11-02 22:34:57,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:34:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-11-02 22:34:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:34:57,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:57,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:57,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:57,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:57,358 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1107383315, now seen corresponding path program 1 times [2021-11-02 22:34:57,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:57,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065277591] [2021-11-02 22:34:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:57,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:57,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:57,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:34:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:34:57,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:57,800 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:34:57,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-02 22:34:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-02 22:34:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:58,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-02 22:34:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:58,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:58,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065277591] [2021-11-02 22:34:58,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065277591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:58,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:58,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-02 22:34:58,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625537209] [2021-11-02 22:34:58,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:34:58,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:34:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:34:58,311 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-02 22:34:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:58,861 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-11-02 22:34:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:34:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 28 [2021-11-02 22:34:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:58,863 INFO L225 Difference]: With dead ends: 98 [2021-11-02 22:34:58,863 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 22:34:58,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:34:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 22:34:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-02 22:34:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 71 states have internal predecessors, (74), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-02 22:34:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-11-02 22:34:58,869 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 28 [2021-11-02 22:34:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:58,870 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-11-02 22:34:58,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-02 22:34:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-11-02 22:34:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:34:58,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:58,871 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:58,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-02 22:34:59,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:59,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:34:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1107383314, now seen corresponding path program 1 times [2021-11-02 22:34:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:59,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180502808] [2021-11-02 22:34:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:59,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:59,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:59,085 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:59,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:34:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:34:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:59,500 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:34:59,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-02 22:34:59,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-02 22:34:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:59,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:00,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-02 22:35:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:00,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180502808] [2021-11-02 22:35:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180502808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:00,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:00,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-02 22:35:00,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844740171] [2021-11-02 22:35:00,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:35:00,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:35:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:35:00,660 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-02 22:35:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:02,089 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-11-02 22:35:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:35:02,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 28 [2021-11-02 22:35:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:02,101 INFO L225 Difference]: With dead ends: 97 [2021-11-02 22:35:02,101 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 22:35:02,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:35:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 22:35:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-02 22:35:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:35:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-11-02 22:35:02,105 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 28 [2021-11-02 22:35:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:02,106 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-11-02 22:35:02,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-02 22:35:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-11-02 22:35:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:35:02,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:02,107 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:02,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-02 22:35:02,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:02,319 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting free_unsafe_13Err2REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:35:02,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:02,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1129381133, now seen corresponding path program 1 times [2021-11-02 22:35:02,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:02,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96358854] [2021-11-02 22:35:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:02,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:02,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:02,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 22:35:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:35:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:02,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:35:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:03,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-02 22:35:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:03,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:04,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-02 22:35:04,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-11-02 22:35:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:05,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:05,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96358854] [2021-11-02 22:35:05,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96358854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:05,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:05,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 16 [2021-11-02 22:35:05,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003144041] [2021-11-02 22:35:05,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:35:05,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:35:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:35:05,518 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-02 22:35:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:07,896 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-11-02 22:35:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:35:07,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2021-11-02 22:35:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:07,898 INFO L225 Difference]: With dead ends: 105 [2021-11-02 22:35:07,898 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:35:07,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:35:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:35:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2021-11-02 22:35:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.302325581395349) internal successors, (56), 55 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:35:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-02 22:35:07,903 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 35 [2021-11-02 22:35:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:07,904 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-02 22:35:07,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-02 22:35:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-02 22:35:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:35:07,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:07,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:07,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:08,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:08,119 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting free_unsafe_13Err3REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:35:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1129381132, now seen corresponding path program 1 times [2021-11-02 22:35:08,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:08,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689546057] [2021-11-02 22:35:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:08,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:08,127 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:08,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 22:35:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:35:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:08,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:35:09,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:09,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:09,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-02 22:35:09,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-02 22:35:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:09,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:12,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-02 22:35:12,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-11-02 22:35:12,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-02 22:35:13,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-02 22:35:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:15,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:15,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689546057] [2021-11-02 22:35:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689546057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:15,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 12] imperfect sequences [] total 24 [2021-11-02 22:35:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24400987] [2021-11-02 22:35:15,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:35:15,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:35:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:35:15,055 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-02 22:35:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:19,966 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-11-02 22:35:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:35:19,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2021-11-02 22:35:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:19,968 INFO L225 Difference]: With dead ends: 98 [2021-11-02 22:35:19,969 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 22:35:19,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:35:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 22:35:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-11-02 22:35:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 54 states have internal predecessors, (55), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:35:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-11-02 22:35:19,973 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 35 [2021-11-02 22:35:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:19,973 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-11-02 22:35:19,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-02 22:35:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-11-02 22:35:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:35:19,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:19,975 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:19,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:20,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:20,187 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:35:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -379497064, now seen corresponding path program 1 times [2021-11-02 22:35:20,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:20,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170278525] [2021-11-02 22:35:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:20,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:20,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:20,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 22:35:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:35:20,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:35:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:21,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-02 22:35:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:21,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:22,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-02 22:35:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2021-11-02 22:35:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:23,707 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:23,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170278525] [2021-11-02 22:35:23,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170278525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:23,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:23,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 13] imperfect sequences [] total 18 [2021-11-02 22:35:23,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504036382] [2021-11-02 22:35:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:35:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:35:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:35:23,710 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-02 22:35:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:26,991 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-11-02 22:35:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:35:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2021-11-02 22:35:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:26,992 INFO L225 Difference]: With dead ends: 104 [2021-11-02 22:35:26,993 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:35:26,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:35:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:35:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-11-02 22:35:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 60 states have internal predecessors, (63), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-02 22:35:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-02 22:35:26,997 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 40 [2021-11-02 22:35:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:26,998 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-02 22:35:26,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-02 22:35:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-02 22:35:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:35:26,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:26,999 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:27,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:27,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:27,207 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:35:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -379497063, now seen corresponding path program 1 times [2021-11-02 22:35:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:27,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058149917] [2021-11-02 22:35:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:27,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:27,208 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:27,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 22:35:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:27,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:35:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:35:28,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-02 22:35:28,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-02 22:35:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:29,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:32,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-02 22:35:32,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:32,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:33,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-02 22:35:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:34,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:34,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058149917] [2021-11-02 22:35:34,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058149917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:34,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:34,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 14] imperfect sequences [] total 28 [2021-11-02 22:35:34,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866345657] [2021-11-02 22:35:34,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:35:34,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:35:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:35:34,923 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-02 22:35:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:40,656 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-11-02 22:35:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:35:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 40 [2021-11-02 22:35:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:40,659 INFO L225 Difference]: With dead ends: 94 [2021-11-02 22:35:40,659 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 22:35:40,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:35:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 22:35:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-11-02 22:35:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 60 states have internal predecessors, (61), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-02 22:35:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-11-02 22:35:40,664 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 40 [2021-11-02 22:35:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:40,664 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-11-02 22:35:40,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-02 22:35:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-11-02 22:35:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:35:40,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:40,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:40,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:40,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:40,880 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:35:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1117904272, now seen corresponding path program 1 times [2021-11-02 22:35:40,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:40,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703614428] [2021-11-02 22:35:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:40,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:40,882 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:40,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-02 22:35:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:35:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:41,634 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:35:41,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-02 22:35:41,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-02 22:35:42,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:42,284 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 22:35:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-02 22:35:42,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-02 22:35:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:42,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:44,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-02 22:35:44,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-02 22:35:44,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-02 22:35:44,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-02 22:35:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:45,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:45,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703614428] [2021-11-02 22:35:45,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703614428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:45,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:45,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17, 17] imperfect sequences [] total 30 [2021-11-02 22:35:45,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187821169] [2021-11-02 22:35:45,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:35:45,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:35:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:35:45,185 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 26 states have internal predecessors, (51), 10 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-02 22:35:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:49,172 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-11-02 22:35:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:35:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 26 states have internal predecessors, (51), 10 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 43 [2021-11-02 22:35:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:49,174 INFO L225 Difference]: With dead ends: 89 [2021-11-02 22:35:49,174 INFO L226 Difference]: Without dead ends: 89 [2021-11-02 22:35:49,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:35:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-02 22:35:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-11-02 22:35:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 60 states have internal predecessors, (60), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-02 22:35:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-02 22:35:49,180 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 43 [2021-11-02 22:35:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:49,180 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-02 22:35:49,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 26 states have internal predecessors, (51), 10 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-02 22:35:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-02 22:35:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:35:49,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:49,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:49,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:49,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:49,395 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __ldv_list_delErr0REQUIRES_VIOLATION === [ldv_msg_allocErr0REQUIRES_VIOLATION, ldv_msg_allocErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION (and 73 more)] === [2021-11-02 22:35:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 129038098, now seen corresponding path program 1 times [2021-11-02 22:35:49,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:49,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320988437] [2021-11-02 22:35:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:49,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:49,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:49,397 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:49,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-02 22:35:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:50,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-02 22:35:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:50,201 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:35:50,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-02 22:35:50,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:35:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-02 22:35:51,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:51,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:51,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:35:51,365 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-02 22:35:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 38 [2021-11-02 22:35:51,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:35:52,098 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 22:35:52,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-02 22:35:52,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-11-02 22:35:52,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-11-02 22:35:53,257 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:35:53,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 27 [2021-11-02 22:35:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:53,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:56,407 INFO L354 Elim1Store]: treesize reduction -1, result has 103.0 percent of original size [2021-11-02 22:35:56,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 95 [2021-11-02 22:35:58,756 INFO L354 Elim1Store]: treesize reduction -1, result has 103.0 percent of original size [2021-11-02 22:35:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 157 [2021-11-02 22:35:59,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2021-11-02 22:35:59,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:35:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 76 [2021-11-02 22:36:00,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:36:00,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 23969 treesize of output 22561 [2021-11-02 22:36:02,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21076 treesize of output 20812 [2021-11-02 22:36:03,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:03,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320988437] [2021-11-02 22:36:03,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-02 22:36:03,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914705625] [2021-11-02 22:36:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:03,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 22:36:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 22:36:03,136 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 22:36:03,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7993960d-8f82-4819-8c49-c0ed94fbd781/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-02 22:36:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-02 22:36:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:04,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,297 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-02 22:36:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-11-02 22:36:04,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-02 22:36:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 22:36:09,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-02 22:36:11,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:36:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:36:12,185 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-02 22:36:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 38 [2021-11-02 22:36:12,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:36:15,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:15,012 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-02 22:36:15,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2021-11-02 22:36:15,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-02 22:36:15,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-11-02 22:36:17,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:36:17,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 41 [2021-11-02 22:36:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:18,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:29,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:36:29,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 6159 treesize of output 5919 [2021-11-02 22:36:29,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5844 treesize of output 5708