./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:53:17,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:17,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:17,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:17,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:17,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:17,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:17,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:17,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:17,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:17,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:17,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:17,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:17,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:17,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:17,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:17,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:17,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:17,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:17,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:17,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:17,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:17,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:17,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:17,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:17,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:17,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:17,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:17,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:17,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:17,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:17,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:17,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:17,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:17,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:17,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:17,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:17,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:17,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:17,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:17,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:17,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:53:17,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:17,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:17,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:17,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:17,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:17,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:17,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:17,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:17,227 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:17,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:17,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:17,229 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:53:17,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:17,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:17,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:17,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:53:17,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:53:17,230 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:53:17,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:17,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:53:17,231 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:17,231 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:17,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:17,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:17,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:17,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:17,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:17,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:17,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:53:17,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:53:17,235 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_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2022-11-02 20:53:17,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:17,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:17,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:17,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:17,511 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:17,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2022-11-02 20:53:17,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/ebae9dc66/752ed276bc33470da785502ef5446310/FLAGe9d2a41c5 [2022-11-02 20:53:18,258 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:53:18,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2022-11-02 20:53:18,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/ebae9dc66/752ed276bc33470da785502ef5446310/FLAGe9d2a41c5 [2022-11-02 20:53:18,432 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/ebae9dc66/752ed276bc33470da785502ef5446310 [2022-11-02 20:53:18,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:53:18,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:53:18,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:18,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:53:18,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:53:18,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:18" (1/1) ... [2022-11-02 20:53:18,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13555f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:18, skipping insertion in model container [2022-11-02 20:53:18,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:18" (1/1) ... [2022-11-02 20:53:18,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:53:18,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:18,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2022-11-02 20:53:19,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:19,306 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-02 20:53:19,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d276490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:19, skipping insertion in model container [2022-11-02 20:53:19,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:19,308 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-02 20:53:19,310 INFO L158 Benchmark]: Toolchain (without parser) took 873.02ms. Allocated memory is still 113.2MB. Free memory was 77.8MB in the beginning and 67.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:53:19,311 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 68.2MB in the beginning and 68.2MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:53:19,311 INFO L158 Benchmark]: CACSL2BoogieTranslator took 870.38ms. Allocated memory is still 113.2MB. Free memory was 77.6MB in the beginning and 67.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:53:19,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 68.2MB in the beginning and 68.2MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 870.38ms. Allocated memory is still 113.2MB. Free memory was 77.6MB in the beginning and 67.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:53:21,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:21,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:21,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:21,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:21,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:21,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:21,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:21,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:21,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:21,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:21,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:21,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:21,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:21,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:21,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:21,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:21,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:21,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:21,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:21,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:21,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:21,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:21,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:21,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:21,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:21,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:21,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:21,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:21,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:21,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:21,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:21,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:21,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:21,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:21,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:21,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:21,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:21,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:21,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:21,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:21,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-02 20:53:21,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:21,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:21,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:21,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:21,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:21,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:21,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:21,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:21,662 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:21,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:21,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:21,664 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:53:21,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:21,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:21,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:21,665 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:53:21,665 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:53:21,665 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:53:21,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:21,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:53:21,666 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:53:21,666 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:53:21,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:21,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:21,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:21,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:21,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:21,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:21,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:21,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:21,668 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:53:21,668 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:53:21,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:53:21,669 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_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2022-11-02 20:53:22,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:22,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:22,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:22,061 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:22,062 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:22,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2022-11-02 20:53:22,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/6b8da3ac6/c8064416441740b39edaddf7c1fe8da7/FLAG239b84bd4 [2022-11-02 20:53:22,914 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:53:22,919 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2022-11-02 20:53:22,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/6b8da3ac6/c8064416441740b39edaddf7c1fe8da7/FLAG239b84bd4 [2022-11-02 20:53:23,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/data/6b8da3ac6/c8064416441740b39edaddf7c1fe8da7 [2022-11-02 20:53:23,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:53:23,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:53:23,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:23,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:53:23,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:53:23,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:23" (1/1) ... [2022-11-02 20:53:23,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5587aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:23, skipping insertion in model container [2022-11-02 20:53:23,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:23" (1/1) ... [2022-11-02 20:53:23,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:53:23,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:23,750 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2022-11-02 20:53:23,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:24,002 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 20:53:24,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:24,063 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2022-11-02 20:53:24,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:24,188 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:53:24,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2022-11-02 20:53:24,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:24,454 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:53:24,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24 WrapperNode [2022-11-02 20:53:24,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:24,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:24,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:53:24,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:53:24,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,667 INFO L138 Inliner]: procedures = 180, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2491 [2022-11-02 20:53:24,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:24,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:53:24,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:53:24,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:53:24,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,850 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:53:24,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:53:24,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:53:24,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:53:24,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (1/1) ... [2022-11-02 20:53:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:24,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:24,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:53:24,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-02 20:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-11-02 20:53:24,965 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-11-02 20:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-02 20:53:24,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:53:24,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:53:24,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-02 20:53:24,966 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-02 20:53:24,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:53:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:53:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:53:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:53:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-02 20:53:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:53:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:53:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-02 20:53:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 20:53:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:53:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:53:25,385 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:53:25,388 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:53:25,392 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:53:36,849 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:53:36,869 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:53:36,870 INFO L300 CfgBuilder]: Removed 168 assume(true) statements. [2022-11-02 20:53:36,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:36 BoogieIcfgContainer [2022-11-02 20:53:36,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:53:36,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:53:36,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:53:36,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:53:36,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:53:23" (1/3) ... [2022-11-02 20:53:36,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5585702e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:36, skipping insertion in model container [2022-11-02 20:53:36,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:24" (2/3) ... [2022-11-02 20:53:36,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5585702e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:36, skipping insertion in model container [2022-11-02 20:53:36,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:36" (3/3) ... [2022-11-02 20:53:36,886 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-3.i [2022-11-02 20:53:36,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:53:36,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2022-11-02 20:53:37,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:53:37,008 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7664193, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:53:37,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2022-11-02 20:53:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 20:53:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-02 20:53:37,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:37,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-02 20:53:37,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:53:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-11-02 20:53:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:37,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364287283] [2022-11-02 20:53:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:37,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:37,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:37,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:53:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:53:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:37,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:53:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:37,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:37,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:37,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364287283] [2022-11-02 20:53:37,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364287283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:37,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:37,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:53:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377302338] [2022-11-02 20:53:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:37,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:53:37,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:53:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:53:37,460 INFO L87 Difference]: Start difference. First operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:43,112 INFO L93 Difference]: Finished difference Result 3281 states and 3483 transitions. [2022-11-02 20:53:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:53:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-02 20:53:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:43,153 INFO L225 Difference]: With dead ends: 3281 [2022-11-02 20:53:43,154 INFO L226 Difference]: Without dead ends: 3279 [2022-11-02 20:53:43,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:53:43,162 INFO L413 NwaCegarLoop]: 1665 mSDtfsCounter, 2318 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:43,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2328 Valid, 2230 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-02 20:53:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-11-02 20:53:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2579. [2022-11-02 20:53:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1398 states have (on average 2.067238912732475) internal successors, (2890), 2563 states have internal predecessors, (2890), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-02 20:53:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2922 transitions. [2022-11-02 20:53:43,321 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2922 transitions. Word has length 3 [2022-11-02 20:53:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:43,322 INFO L495 AbstractCegarLoop]: Abstraction has 2579 states and 2922 transitions. [2022-11-02 20:53:43,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2922 transitions. [2022-11-02 20:53:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-02 20:53:43,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:43,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-02 20:53:43,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:43,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:43,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:53:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-11-02 20:53:43,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:43,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665918401] [2022-11-02 20:53:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:43,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:43,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:43,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:43,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:53:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:53:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:43,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:53:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:43,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:43,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:43,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665918401] [2022-11-02 20:53:43,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665918401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:43,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:43,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:53:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533635534] [2022-11-02 20:53:43,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:53:43,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:53:43,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:53:43,833 INFO L87 Difference]: Start difference. First operand 2579 states and 2922 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:51,853 INFO L93 Difference]: Finished difference Result 3727 states and 4170 transitions. [2022-11-02 20:53:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:53:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-02 20:53:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:51,867 INFO L225 Difference]: With dead ends: 3727 [2022-11-02 20:53:51,867 INFO L226 Difference]: Without dead ends: 3727 [2022-11-02 20:53:51,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:53:51,869 INFO L413 NwaCegarLoop]: 2045 mSDtfsCounter, 1240 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3433 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:51,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 3433 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-02 20:53:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2022-11-02 20:53:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3028. [2022-11-02 20:53:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 1845 states have (on average 2.0233062330623306) internal successors, (3733), 3009 states have internal predecessors, (3733), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-02 20:53:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3771 transitions. [2022-11-02 20:53:51,939 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3771 transitions. Word has length 3 [2022-11-02 20:53:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:51,939 INFO L495 AbstractCegarLoop]: Abstraction has 3028 states and 3771 transitions. [2022-11-02 20:53:51,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3771 transitions. [2022-11-02 20:53:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:53:51,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:51,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:51,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-02 20:53:52,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:52,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:53:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-11-02 20:53:52,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:52,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577766413] [2022-11-02 20:53:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:52,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:52,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:52,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:52,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:53:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:52,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:52,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:53:52,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:53:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:53:52,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:53:52,599 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:53:52,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:53:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:52,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:52,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577766413] [2022-11-02 20:53:52,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577766413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:52,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:52,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:53:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252502296] [2022-11-02 20:53:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:52,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:53:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:53:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:53:52,629 INFO L87 Difference]: Start difference. First operand 3028 states and 3771 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:08,124 INFO L93 Difference]: Finished difference Result 6006 states and 6937 transitions. [2022-11-02 20:54:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:08,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:54:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:08,145 INFO L225 Difference]: With dead ends: 6006 [2022-11-02 20:54:08,146 INFO L226 Difference]: Without dead ends: 6006 [2022-11-02 20:54:08,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:08,149 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 3127 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 4719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3137 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:08,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3137 Valid, 3162 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4719 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-11-02 20:54:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2022-11-02 20:54:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3747. [2022-11-02 20:54:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2564 states have (on average 2.0514820592823715) internal successors, (5260), 3722 states have internal predecessors, (5260), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 5310 transitions. [2022-11-02 20:54:08,256 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 5310 transitions. Word has length 7 [2022-11-02 20:54:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:08,257 INFO L495 AbstractCegarLoop]: Abstraction has 3747 states and 5310 transitions. [2022-11-02 20:54:08,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 5310 transitions. [2022-11-02 20:54:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:54:08,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:08,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:08,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-02 20:54:08,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:08,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-11-02 20:54:08,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:08,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484957391] [2022-11-02 20:54:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:08,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:08,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:08,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:08,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:54:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:54:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:08,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:54:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:08,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:08,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:08,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484957391] [2022-11-02 20:54:08,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484957391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:08,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:08,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981699614] [2022-11-02 20:54:08,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:08,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:08,751 INFO L87 Difference]: Start difference. First operand 3747 states and 5310 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:13,539 INFO L93 Difference]: Finished difference Result 4951 states and 6827 transitions. [2022-11-02 20:54:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:54:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:13,555 INFO L225 Difference]: With dead ends: 4951 [2022-11-02 20:54:13,555 INFO L226 Difference]: Without dead ends: 4951 [2022-11-02 20:54:13,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:13,556 INFO L413 NwaCegarLoop]: 2366 mSDtfsCounter, 1998 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:13,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 3212 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-02 20:54:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2022-11-02 20:54:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3656. [2022-11-02 20:54:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 2564 states have (on average 1.968408736349454) internal successors, (5047), 3631 states have internal predecessors, (5047), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5097 transitions. [2022-11-02 20:54:13,632 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5097 transitions. Word has length 8 [2022-11-02 20:54:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:13,632 INFO L495 AbstractCegarLoop]: Abstraction has 3656 states and 5097 transitions. [2022-11-02 20:54:13,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5097 transitions. [2022-11-02 20:54:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:54:13,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:13,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:13,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:13,851 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-11-02 20:54:13,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29095606] [2022-11-02 20:54:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:13,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:13,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:54:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:14,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:54:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:14,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:14,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:14,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29095606] [2022-11-02 20:54:14,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29095606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:14,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:14,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123508025] [2022-11-02 20:54:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:14,133 INFO L87 Difference]: Start difference. First operand 3656 states and 5097 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:21,270 INFO L93 Difference]: Finished difference Result 5371 states and 7455 transitions. [2022-11-02 20:54:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:54:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:21,288 INFO L225 Difference]: With dead ends: 5371 [2022-11-02 20:54:21,288 INFO L226 Difference]: Without dead ends: 5371 [2022-11-02 20:54:21,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:21,289 INFO L413 NwaCegarLoop]: 2746 mSDtfsCounter, 1369 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:21,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 3931 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-02 20:54:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2022-11-02 20:54:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3978. [2022-11-02 20:54:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 2896 states have (on average 1.9540745856353592) internal successors, (5659), 3953 states have internal predecessors, (5659), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5709 transitions. [2022-11-02 20:54:21,371 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5709 transitions. Word has length 8 [2022-11-02 20:54:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:21,371 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5709 transitions. [2022-11-02 20:54:21,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5709 transitions. [2022-11-02 20:54:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:54:21,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:21,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:21,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:21,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:21,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-11-02 20:54:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263713372] [2022-11-02 20:54:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:21,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:21,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:21,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:54:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:21,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:21,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263713372] [2022-11-02 20:54:21,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263713372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:21,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:21,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:21,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604988563] [2022-11-02 20:54:21,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:21,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:21,828 INFO L87 Difference]: Start difference. First operand 3978 states and 5709 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:21,900 INFO L93 Difference]: Finished difference Result 3918 states and 5623 transitions. [2022-11-02 20:54:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:21,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-02 20:54:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:21,918 INFO L225 Difference]: With dead ends: 3918 [2022-11-02 20:54:21,918 INFO L226 Difference]: Without dead ends: 3918 [2022-11-02 20:54:21,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:21,920 INFO L413 NwaCegarLoop]: 2407 mSDtfsCounter, 1197 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:21,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 3623 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-11-02 20:54:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2022-11-02 20:54:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 2860 states have (on average 1.9486013986013986) internal successors, (5573), 3893 states have internal predecessors, (5573), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5623 transitions. [2022-11-02 20:54:21,998 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5623 transitions. Word has length 11 [2022-11-02 20:54:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:21,999 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 5623 transitions. [2022-11-02 20:54:21,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5623 transitions. [2022-11-02 20:54:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:54:22,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:22,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:22,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:22,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:22,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:22,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:22,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-11-02 20:54:22,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:22,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386212059] [2022-11-02 20:54:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:22,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:22,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:22,217 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:22,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:54:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:54:22,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:22,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:22,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:22,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386212059] [2022-11-02 20:54:22,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386212059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:22,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:22,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:54:22,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299815378] [2022-11-02 20:54:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:22,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:22,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:22,455 INFO L87 Difference]: Start difference. First operand 3918 states and 5623 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:22,564 INFO L93 Difference]: Finished difference Result 3890 states and 5567 transitions. [2022-11-02 20:54:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:54:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:22,575 INFO L225 Difference]: With dead ends: 3890 [2022-11-02 20:54:22,576 INFO L226 Difference]: Without dead ends: 3890 [2022-11-02 20:54:22,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:22,577 INFO L413 NwaCegarLoop]: 2362 mSDtfsCounter, 1168 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5933 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:22,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 5933 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-11-02 20:54:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3888. [2022-11-02 20:54:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 2844 states have (on average 1.939170182841069) internal successors, (5515), 3863 states have internal predecessors, (5515), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 5565 transitions. [2022-11-02 20:54:22,645 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 5565 transitions. Word has length 13 [2022-11-02 20:54:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:22,645 INFO L495 AbstractCegarLoop]: Abstraction has 3888 states and 5565 transitions. [2022-11-02 20:54:22,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 5565 transitions. [2022-11-02 20:54:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:54:22,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:22,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:22,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:22,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:22,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-11-02 20:54:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:22,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290877550] [2022-11-02 20:54:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:22,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:22,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:54:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:23,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:23,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:23,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:23,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290877550] [2022-11-02 20:54:23,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290877550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:23,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:23,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:23,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068625889] [2022-11-02 20:54:23,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:23,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:23,166 INFO L87 Difference]: Start difference. First operand 3888 states and 5565 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:23,253 INFO L93 Difference]: Finished difference Result 5514 states and 7318 transitions. [2022-11-02 20:54:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:54:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:23,266 INFO L225 Difference]: With dead ends: 5514 [2022-11-02 20:54:23,266 INFO L226 Difference]: Without dead ends: 5514 [2022-11-02 20:54:23,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:23,267 INFO L413 NwaCegarLoop]: 4091 mSDtfsCounter, 2288 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:23,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 5893 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2022-11-02 20:54:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 3828. [2022-11-02 20:54:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 2808 states have (on average 1.9334045584045585) internal successors, (5429), 3803 states have internal predecessors, (5429), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 5479 transitions. [2022-11-02 20:54:23,355 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 5479 transitions. Word has length 20 [2022-11-02 20:54:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:23,355 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 5479 transitions. [2022-11-02 20:54:23,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 5479 transitions. [2022-11-02 20:54:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:54:23,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:23,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:23,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:23,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:23,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-11-02 20:54:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:23,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623248635] [2022-11-02 20:54:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:23,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:23,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:23,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:54:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:54:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:23,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:23,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623248635] [2022-11-02 20:54:23,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623248635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:23,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:23,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622354666] [2022-11-02 20:54:23,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:23,888 INFO L87 Difference]: Start difference. First operand 3828 states and 5479 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:23,944 INFO L93 Difference]: Finished difference Result 5347 states and 7027 transitions. [2022-11-02 20:54:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:54:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:23,955 INFO L225 Difference]: With dead ends: 5347 [2022-11-02 20:54:23,955 INFO L226 Difference]: Without dead ends: 5347 [2022-11-02 20:54:23,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:23,956 INFO L413 NwaCegarLoop]: 3778 mSDtfsCounter, 2245 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2255 SdHoareTripleChecker+Valid, 5532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:23,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2255 Valid, 5532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2022-11-02 20:54:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3696. [2022-11-02 20:54:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2700 states have (on average 1.915185185185185) internal successors, (5171), 3671 states have internal predecessors, (5171), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5221 transitions. [2022-11-02 20:54:24,021 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5221 transitions. Word has length 20 [2022-11-02 20:54:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:24,021 INFO L495 AbstractCegarLoop]: Abstraction has 3696 states and 5221 transitions. [2022-11-02 20:54:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5221 transitions. [2022-11-02 20:54:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:54:24,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:24,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:24,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:24,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:24,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-11-02 20:54:24,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:24,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110880754] [2022-11-02 20:54:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:24,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:24,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:54:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:54:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:24,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:24,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:24,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110880754] [2022-11-02 20:54:24,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110880754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:24,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:24,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:54:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736485928] [2022-11-02 20:54:24,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:24,529 INFO L87 Difference]: Start difference. First operand 3696 states and 5221 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:24,696 INFO L93 Difference]: Finished difference Result 5312 states and 6961 transitions. [2022-11-02 20:54:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 20:54:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:24,707 INFO L225 Difference]: With dead ends: 5312 [2022-11-02 20:54:24,707 INFO L226 Difference]: Without dead ends: 5312 [2022-11-02 20:54:24,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:24,708 INFO L413 NwaCegarLoop]: 3960 mSDtfsCounter, 2216 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 9672 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:24,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 9672 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2022-11-02 20:54:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 3666. [2022-11-02 20:54:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2684 states have (on average 1.9049925484351713) internal successors, (5113), 3641 states have internal predecessors, (5113), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5163 transitions. [2022-11-02 20:54:24,778 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5163 transitions. Word has length 22 [2022-11-02 20:54:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:24,778 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5163 transitions. [2022-11-02 20:54:24,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5163 transitions. [2022-11-02 20:54:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:54:24,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:24,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:24,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:24,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:24,997 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:24,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-11-02 20:54:24,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:24,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460313213] [2022-11-02 20:54:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:24,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:25,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:25,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:54:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:54:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:25,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:25,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460313213] [2022-11-02 20:54:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460313213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:25,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:25,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:54:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871617153] [2022-11-02 20:54:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:25,296 INFO L87 Difference]: Start difference. First operand 3666 states and 5163 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:25,423 INFO L93 Difference]: Finished difference Result 5239 states and 6772 transitions. [2022-11-02 20:54:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:25,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 20:54:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:25,435 INFO L225 Difference]: With dead ends: 5239 [2022-11-02 20:54:25,435 INFO L226 Difference]: Without dead ends: 5239 [2022-11-02 20:54:25,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:25,436 INFO L413 NwaCegarLoop]: 3885 mSDtfsCounter, 2181 mSDsluCounter, 5597 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 9482 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:25,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2191 Valid, 9482 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2022-11-02 20:54:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 3604. [2022-11-02 20:54:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2636 states have (on average 1.8736722306525038) internal successors, (4939), 3579 states have internal predecessors, (4939), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 4989 transitions. [2022-11-02 20:54:25,499 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 4989 transitions. Word has length 22 [2022-11-02 20:54:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:25,501 INFO L495 AbstractCegarLoop]: Abstraction has 3604 states and 4989 transitions. [2022-11-02 20:54:25,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 4989 transitions. [2022-11-02 20:54:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:54:25,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:25,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:25,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:25,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:25,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-11-02 20:54:25,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:25,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649072803] [2022-11-02 20:54:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:25,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:25,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:25,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:54:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:25,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:54:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:26,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:26,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649072803] [2022-11-02 20:54:26,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649072803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:26,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:26,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208954031] [2022-11-02 20:54:26,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:26,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:26,073 INFO L87 Difference]: Start difference. First operand 3604 states and 4989 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:31,449 INFO L93 Difference]: Finished difference Result 4225 states and 5525 transitions. [2022-11-02 20:54:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:54:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:31,457 INFO L225 Difference]: With dead ends: 4225 [2022-11-02 20:54:31,457 INFO L226 Difference]: Without dead ends: 4225 [2022-11-02 20:54:31,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:31,458 INFO L413 NwaCegarLoop]: 1515 mSDtfsCounter, 3097 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:31,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3103 Valid, 2793 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-02 20:54:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2022-11-02 20:54:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3600. [2022-11-02 20:54:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 2636 states have (on average 1.8706373292867982) internal successors, (4931), 3575 states have internal predecessors, (4931), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4981 transitions. [2022-11-02 20:54:31,508 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4981 transitions. Word has length 27 [2022-11-02 20:54:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:31,508 INFO L495 AbstractCegarLoop]: Abstraction has 3600 states and 4981 transitions. [2022-11-02 20:54:31,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4981 transitions. [2022-11-02 20:54:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:54:31,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:31,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:31,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 20:54:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:31,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-11-02 20:54:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:31,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435101871] [2022-11-02 20:54:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:31,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:31,724 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:31,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:54:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:54:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:32,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:54:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:32,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:32,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:32,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435101871] [2022-11-02 20:54:32,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435101871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:32,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:32,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134079973] [2022-11-02 20:54:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:32,179 INFO L87 Difference]: Start difference. First operand 3600 states and 4981 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:40,754 INFO L93 Difference]: Finished difference Result 4679 states and 6151 transitions. [2022-11-02 20:54:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:54:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:54:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:40,781 INFO L225 Difference]: With dead ends: 4679 [2022-11-02 20:54:40,781 INFO L226 Difference]: Without dead ends: 4679 [2022-11-02 20:54:40,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:40,782 INFO L413 NwaCegarLoop]: 1748 mSDtfsCounter, 2279 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2279 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:40,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2279 Valid, 4099 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-02 20:54:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-11-02 20:54:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3636. [2022-11-02 20:54:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2672 states have (on average 1.8607784431137724) internal successors, (4972), 3611 states have internal predecessors, (4972), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5022 transitions. [2022-11-02 20:54:40,835 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5022 transitions. Word has length 27 [2022-11-02 20:54:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:40,835 INFO L495 AbstractCegarLoop]: Abstraction has 3636 states and 5022 transitions. [2022-11-02 20:54:40,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5022 transitions. [2022-11-02 20:54:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:54:40,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:40,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:40,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:41,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:41,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-11-02 20:54:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105963970] [2022-11-02 20:54:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:41,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:41,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:41,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:54:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:41,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:54:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:41,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:41,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:41,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105963970] [2022-11-02 20:54:41,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105963970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:41,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:41,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:41,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854924420] [2022-11-02 20:54:41,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:41,474 INFO L87 Difference]: Start difference. First operand 3636 states and 5022 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:49,309 INFO L93 Difference]: Finished difference Result 7033 states and 9556 transitions. [2022-11-02 20:54:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:54:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-02 20:54:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:49,319 INFO L225 Difference]: With dead ends: 7033 [2022-11-02 20:54:49,319 INFO L226 Difference]: Without dead ends: 7033 [2022-11-02 20:54:49,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:49,320 INFO L413 NwaCegarLoop]: 2580 mSDtfsCounter, 4500 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 4978 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:49,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4507 Valid, 4978 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-02 20:54:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2022-11-02 20:54:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3632. [2022-11-02 20:54:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 2672 states have (on average 1.8577844311377245) internal successors, (4964), 3607 states have internal predecessors, (4964), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:54:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 5014 transitions. [2022-11-02 20:54:49,389 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 5014 transitions. Word has length 36 [2022-11-02 20:54:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:49,389 INFO L495 AbstractCegarLoop]: Abstraction has 3632 states and 5014 transitions. [2022-11-02 20:54:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 5014 transitions. [2022-11-02 20:54:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:54:49,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:49,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:49,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:49,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:49,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:54:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-11-02 20:54:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824789197] [2022-11-02 20:54:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:49,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:49,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:49,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:49,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:54:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:54:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:49,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:54:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:50,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:50,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:50,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824789197] [2022-11-02 20:54:50,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824789197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:50,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:50,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:50,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017653675] [2022-11-02 20:54:50,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:50,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:50,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:50,119 INFO L87 Difference]: Start difference. First operand 3632 states and 5014 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:01,365 INFO L93 Difference]: Finished difference Result 6725 states and 8957 transitions. [2022-11-02 20:55:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:55:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-02 20:55:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:01,372 INFO L225 Difference]: With dead ends: 6725 [2022-11-02 20:55:01,372 INFO L226 Difference]: Without dead ends: 6725 [2022-11-02 20:55:01,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:01,373 INFO L413 NwaCegarLoop]: 2937 mSDtfsCounter, 3252 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 5833 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:01,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3256 Valid, 5833 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-02 20:55:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2022-11-02 20:55:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 3628. [2022-11-02 20:55:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 2672 states have (on average 1.8547904191616766) internal successors, (4956), 3603 states have internal predecessors, (4956), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:55:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 5006 transitions. [2022-11-02 20:55:01,441 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 5006 transitions. Word has length 36 [2022-11-02 20:55:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:01,442 INFO L495 AbstractCegarLoop]: Abstraction has 3628 states and 5006 transitions. [2022-11-02 20:55:01,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 5006 transitions. [2022-11-02 20:55:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:55:01,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:01,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:01,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:01,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:01,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-11-02 20:55:01,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:01,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482262630] [2022-11-02 20:55:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:01,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:01,660 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:01,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:55:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:55:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:01,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:55:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:02,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:02,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482262630] [2022-11-02 20:55:02,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482262630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:02,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:02,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:02,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886066172] [2022-11-02 20:55:02,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:02,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:02,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:02,082 INFO L87 Difference]: Start difference. First operand 3628 states and 5006 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:10,577 INFO L93 Difference]: Finished difference Result 7477 states and 10068 transitions. [2022-11-02 20:55:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:55:10,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-02 20:55:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:10,587 INFO L225 Difference]: With dead ends: 7477 [2022-11-02 20:55:10,588 INFO L226 Difference]: Without dead ends: 7477 [2022-11-02 20:55:10,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:10,589 INFO L413 NwaCegarLoop]: 2542 mSDtfsCounter, 4861 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4871 SdHoareTripleChecker+Valid, 5133 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:10,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4871 Valid, 5133 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-02 20:55:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2022-11-02 20:55:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 3625. [2022-11-02 20:55:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 2672 states have (on average 1.846556886227545) internal successors, (4934), 3600 states have internal predecessors, (4934), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:55:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4984 transitions. [2022-11-02 20:55:10,656 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4984 transitions. Word has length 36 [2022-11-02 20:55:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:10,656 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 4984 transitions. [2022-11-02 20:55:10,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4984 transitions. [2022-11-02 20:55:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:55:10,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:10,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:10,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:10,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:10,870 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-11-02 20:55:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:10,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366193672] [2022-11-02 20:55:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:10,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:10,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:10,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:10,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:55:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:55:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:11,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:55:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:11,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:11,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:11,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366193672] [2022-11-02 20:55:11,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366193672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:11,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:11,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41715804] [2022-11-02 20:55:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:11,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:11,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:11,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:11,412 INFO L87 Difference]: Start difference. First operand 3625 states and 4984 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:21,042 INFO L93 Difference]: Finished difference Result 5561 states and 7343 transitions. [2022-11-02 20:55:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:55:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-02 20:55:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:21,048 INFO L225 Difference]: With dead ends: 5561 [2022-11-02 20:55:21,048 INFO L226 Difference]: Without dead ends: 5561 [2022-11-02 20:55:21,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:21,049 INFO L413 NwaCegarLoop]: 2838 mSDtfsCounter, 2602 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:21,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 5307 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-02 20:55:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2022-11-02 20:55:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3625. [2022-11-02 20:55:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 2672 states have (on average 1.843562874251497) internal successors, (4926), 3600 states have internal predecessors, (4926), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:55:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4976 transitions. [2022-11-02 20:55:21,145 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4976 transitions. Word has length 36 [2022-11-02 20:55:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:21,145 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 4976 transitions. [2022-11-02 20:55:21,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4976 transitions. [2022-11-02 20:55:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:55:21,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:21,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:21,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:21,347 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-11-02 20:55:21,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139064439] [2022-11-02 20:55:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:21,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:21,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:21,349 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:21,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:55:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:21,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:21,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139064439] [2022-11-02 20:55:21,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139064439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:21,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:21,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466818186] [2022-11-02 20:55:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:21,703 INFO L87 Difference]: Start difference. First operand 3625 states and 4976 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:21,783 INFO L93 Difference]: Finished difference Result 3613 states and 4952 transitions. [2022-11-02 20:55:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-02 20:55:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:21,788 INFO L225 Difference]: With dead ends: 3613 [2022-11-02 20:55:21,788 INFO L226 Difference]: Without dead ends: 3613 [2022-11-02 20:55:21,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:21,789 INFO L413 NwaCegarLoop]: 2193 mSDtfsCounter, 1152 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:21,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 5414 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-11-02 20:55:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3613. [2022-11-02 20:55:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 2660 states have (on average 1.8428571428571427) internal successors, (4902), 3588 states have internal predecessors, (4902), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-02 20:55:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 4952 transitions. [2022-11-02 20:55:21,839 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 4952 transitions. Word has length 40 [2022-11-02 20:55:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:21,839 INFO L495 AbstractCegarLoop]: Abstraction has 3613 states and 4952 transitions. [2022-11-02 20:55:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 4952 transitions. [2022-11-02 20:55:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:55:21,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:21,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:21,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:22,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:22,053 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-11-02 20:55:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:22,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388862767] [2022-11-02 20:55:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:22,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:22,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:22,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:22,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:55:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:22,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:22,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388862767] [2022-11-02 20:55:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388862767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:22,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:22,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:22,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136704629] [2022-11-02 20:55:22,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:22,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:22,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:22,620 INFO L87 Difference]: Start difference. First operand 3613 states and 4952 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:23,044 INFO L93 Difference]: Finished difference Result 5433 states and 7161 transitions. [2022-11-02 20:55:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-02 20:55:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:23,051 INFO L225 Difference]: With dead ends: 5433 [2022-11-02 20:55:23,051 INFO L226 Difference]: Without dead ends: 5433 [2022-11-02 20:55:23,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:23,052 INFO L413 NwaCegarLoop]: 2282 mSDtfsCounter, 1568 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:23,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 4321 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:55:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2022-11-02 20:55:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4630. [2022-11-02 20:55:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4630 states, 3670 states have (on average 1.8258855585831062) internal successors, (6701), 4595 states have internal predecessors, (6701), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-02 20:55:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 6771 transitions. [2022-11-02 20:55:23,116 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 6771 transitions. Word has length 48 [2022-11-02 20:55:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:23,117 INFO L495 AbstractCegarLoop]: Abstraction has 4630 states and 6771 transitions. [2022-11-02 20:55:23,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 6771 transitions. [2022-11-02 20:55:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:55:23,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:23,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:23,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:23,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-11-02 20:55:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:23,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226039326] [2022-11-02 20:55:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:23,341 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:23,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:55:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:23,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:23,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:23,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226039326] [2022-11-02 20:55:23,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226039326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:23,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:23,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:23,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062403589] [2022-11-02 20:55:23,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:23,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:23,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:23,774 INFO L87 Difference]: Start difference. First operand 4630 states and 6771 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:23,876 INFO L93 Difference]: Finished difference Result 5942 states and 8145 transitions. [2022-11-02 20:55:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-02 20:55:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:23,884 INFO L225 Difference]: With dead ends: 5942 [2022-11-02 20:55:23,885 INFO L226 Difference]: Without dead ends: 5942 [2022-11-02 20:55:23,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:23,886 INFO L413 NwaCegarLoop]: 3432 mSDtfsCounter, 2151 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 8347 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:23,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 8347 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2022-11-02 20:55:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4588. [2022-11-02 20:55:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 3628 states have (on average 1.8277287761852261) internal successors, (6631), 4553 states have internal predecessors, (6631), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-02 20:55:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6701 transitions. [2022-11-02 20:55:23,955 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6701 transitions. Word has length 51 [2022-11-02 20:55:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:23,955 INFO L495 AbstractCegarLoop]: Abstraction has 4588 states and 6701 transitions. [2022-11-02 20:55:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6701 transitions. [2022-11-02 20:55:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:55:23,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:23,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:23,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:24,176 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-11-02 20:55:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:24,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597162468] [2022-11-02 20:55:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:24,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:24,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:24,179 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:24,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:55:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:24,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:24,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597162468] [2022-11-02 20:55:24,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597162468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:24,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:24,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:24,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982849951] [2022-11-02 20:55:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:24,696 INFO L87 Difference]: Start difference. First operand 4588 states and 6701 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:24,799 INFO L93 Difference]: Finished difference Result 5678 states and 7631 transitions. [2022-11-02 20:55:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-02 20:55:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:24,807 INFO L225 Difference]: With dead ends: 5678 [2022-11-02 20:55:24,808 INFO L226 Difference]: Without dead ends: 5678 [2022-11-02 20:55:24,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:24,808 INFO L413 NwaCegarLoop]: 3694 mSDtfsCounter, 2142 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 8920 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:24,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 8920 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-11-02 20:55:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 4570. [2022-11-02 20:55:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 3610 states have (on average 1.8285318559556787) internal successors, (6601), 4535 states have internal predecessors, (6601), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-02 20:55:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 6671 transitions. [2022-11-02 20:55:24,870 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 6671 transitions. Word has length 54 [2022-11-02 20:55:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:24,870 INFO L495 AbstractCegarLoop]: Abstraction has 4570 states and 6671 transitions. [2022-11-02 20:55:24,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 6671 transitions. [2022-11-02 20:55:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:55:24,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:24,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:24,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:25,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:25,086 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -345082942, now seen corresponding path program 1 times [2022-11-02 20:55:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:25,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368271953] [2022-11-02 20:55:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:25,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:25,089 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:25,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:55:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:55:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:55:25,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 38 [2022-11-02 20:55:25,498 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:25,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 22 [2022-11-02 20:55:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:25,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:25,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368271953] [2022-11-02 20:55:25,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368271953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:25,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:25,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643601542] [2022-11-02 20:55:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:25,546 INFO L87 Difference]: Start difference. First operand 4570 states and 6671 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:27,943 INFO L93 Difference]: Finished difference Result 4797 states and 6909 transitions. [2022-11-02 20:55:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-02 20:55:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:27,950 INFO L225 Difference]: With dead ends: 4797 [2022-11-02 20:55:27,950 INFO L226 Difference]: Without dead ends: 4797 [2022-11-02 20:55:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:27,951 INFO L413 NwaCegarLoop]: 2071 mSDtfsCounter, 1031 mSDsluCounter, 3298 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 5369 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:27,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 5369 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 327 Invalid, 0 Unknown, 132 Unchecked, 2.3s Time] [2022-11-02 20:55:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2022-11-02 20:55:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4536. [2022-11-02 20:55:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 3576 states have (on average 1.8361297539149888) internal successors, (6566), 4501 states have internal predecessors, (6566), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-02 20:55:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 6636 transitions. [2022-11-02 20:55:28,009 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 6636 transitions. Word has length 57 [2022-11-02 20:55:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:28,009 INFO L495 AbstractCegarLoop]: Abstraction has 4536 states and 6636 transitions. [2022-11-02 20:55:28,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 6636 transitions. [2022-11-02 20:55:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:55:28,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:28,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:28,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:28,232 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-11-02 20:55:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670312101] [2022-11-02 20:55:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:28,235 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:28,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:55:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:28,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:28,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:28,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670312101] [2022-11-02 20:55:28,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670312101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:28,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:28,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269117612] [2022-11-02 20:55:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:28,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:28,940 INFO L87 Difference]: Start difference. First operand 4536 states and 6636 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:29,196 INFO L93 Difference]: Finished difference Result 6338 states and 8912 transitions. [2022-11-02 20:55:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-02 20:55:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:29,205 INFO L225 Difference]: With dead ends: 6338 [2022-11-02 20:55:29,205 INFO L226 Difference]: Without dead ends: 6338 [2022-11-02 20:55:29,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:29,206 INFO L413 NwaCegarLoop]: 2414 mSDtfsCounter, 1265 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 4482 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:29,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 4482 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2022-11-02 20:55:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 5609. [2022-11-02 20:55:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 4641 states have (on average 1.810385692738634) internal successors, (8402), 5563 states have internal predecessors, (8402), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:55:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8494 transitions. [2022-11-02 20:55:29,278 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8494 transitions. Word has length 59 [2022-11-02 20:55:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:29,279 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8494 transitions. [2022-11-02 20:55:29,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8494 transitions. [2022-11-02 20:55:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 20:55:29,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:29,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:29,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:29,495 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-11-02 20:55:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784373836] [2022-11-02 20:55:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:29,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:29,497 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:55:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:55:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:30,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:55:30,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:55:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:30,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:55:30,621 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:30,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:55:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:30,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:30,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:30,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784373836] [2022-11-02 20:55:30,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784373836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:30,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:30,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344877209] [2022-11-02 20:55:30,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:30,642 INFO L87 Difference]: Start difference. First operand 5609 states and 8494 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:37,514 INFO L93 Difference]: Finished difference Result 8028 states and 12217 transitions. [2022-11-02 20:55:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:37,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-02 20:55:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:37,525 INFO L225 Difference]: With dead ends: 8028 [2022-11-02 20:55:37,525 INFO L226 Difference]: Without dead ends: 8028 [2022-11-02 20:55:37,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:37,526 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 2474 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:37,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 1766 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-02 20:55:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2022-11-02 20:55:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 5369. [2022-11-02 20:55:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 4485 states have (on average 1.7438127090301003) internal successors, (7821), 5323 states have internal predecessors, (7821), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:55:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 7913 transitions. [2022-11-02 20:55:37,630 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 7913 transitions. Word has length 62 [2022-11-02 20:55:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:37,631 INFO L495 AbstractCegarLoop]: Abstraction has 5369 states and 7913 transitions. [2022-11-02 20:55:37,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 7913 transitions. [2022-11-02 20:55:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:55:37,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:37,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:37,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:37,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:37,848 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-11-02 20:55:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:37,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673117508] [2022-11-02 20:55:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:37,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:37,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:37,852 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:37,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:55:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:38,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:55:38,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:55:38,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 20:55:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:38,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:38,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:38,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673117508] [2022-11-02 20:55:38,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673117508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:38,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:38,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451625425] [2022-11-02 20:55:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:55:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:55:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:38,404 INFO L87 Difference]: Start difference. First operand 5369 states and 7913 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:44,629 INFO L93 Difference]: Finished difference Result 5368 states and 7910 transitions. [2022-11-02 20:55:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:55:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-02 20:55:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:44,638 INFO L225 Difference]: With dead ends: 5368 [2022-11-02 20:55:44,638 INFO L226 Difference]: Without dead ends: 5368 [2022-11-02 20:55:44,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:44,639 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 4 mSDsluCounter, 3458 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5570 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:44,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5570 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2883 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-02 20:55:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-11-02 20:55:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5368. [2022-11-02 20:55:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 4485 states have (on average 1.7431438127090302) internal successors, (7818), 5322 states have internal predecessors, (7818), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:55:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 7910 transitions. [2022-11-02 20:55:44,727 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 7910 transitions. Word has length 67 [2022-11-02 20:55:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:44,728 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 7910 transitions. [2022-11-02 20:55:44,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 7910 transitions. [2022-11-02 20:55:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:55:44,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:44,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:44,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:44,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:44,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-11-02 20:55:44,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:44,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032990752] [2022-11-02 20:55:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:44,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:44,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:44,931 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:44,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:55:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:55:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:45,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:55:45,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:55:45,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:55:45,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-02 20:55:45,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:55:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:45,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:45,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032990752] [2022-11-02 20:55:45,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032990752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:45,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:45,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:45,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653682122] [2022-11-02 20:55:45,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:45,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:55:45,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:55:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:45,442 INFO L87 Difference]: Start difference. First operand 5368 states and 7910 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:54,091 INFO L93 Difference]: Finished difference Result 5367 states and 7907 transitions. [2022-11-02 20:55:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:55:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-02 20:55:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:54,097 INFO L225 Difference]: With dead ends: 5367 [2022-11-02 20:55:54,097 INFO L226 Difference]: Without dead ends: 5367 [2022-11-02 20:55:54,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:54,097 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 2 mSDsluCounter, 3459 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5571 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:54,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5571 Invalid, 2881 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-02 20:55:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2022-11-02 20:55:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5367. [2022-11-02 20:55:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 4482 states have (on average 1.7436412315930387) internal successors, (7815), 5321 states have internal predecessors, (7815), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:55:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7907 transitions. [2022-11-02 20:55:54,157 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7907 transitions. Word has length 67 [2022-11-02 20:55:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:54,157 INFO L495 AbstractCegarLoop]: Abstraction has 5367 states and 7907 transitions. [2022-11-02 20:55:54,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7907 transitions. [2022-11-02 20:55:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:55:54,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:54,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:54,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:54,375 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:55:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-11-02 20:55:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:54,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836389719] [2022-11-02 20:55:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:54,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:54,378 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:54,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:55:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:54,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:54,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:55:54,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:55:54,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 20:55:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:54,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:54,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836389719] [2022-11-02 20:55:54,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836389719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:54,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:54,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:54,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861183158] [2022-11-02 20:55:54,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:54,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:55:54,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:54,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:55:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:54,892 INFO L87 Difference]: Start difference. First operand 5367 states and 7907 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:01,167 INFO L93 Difference]: Finished difference Result 5366 states and 7903 transitions. [2022-11-02 20:56:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:56:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-02 20:56:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:01,172 INFO L225 Difference]: With dead ends: 5366 [2022-11-02 20:56:01,172 INFO L226 Difference]: Without dead ends: 5366 [2022-11-02 20:56:01,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:01,173 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 4 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5565 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:01,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5565 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-02 20:56:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2022-11-02 20:56:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 5366. [2022-11-02 20:56:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5366 states, 4482 states have (on average 1.7427487728692548) internal successors, (7811), 5320 states have internal predecessors, (7811), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:56:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5366 states to 5366 states and 7903 transitions. [2022-11-02 20:56:01,226 INFO L78 Accepts]: Start accepts. Automaton has 5366 states and 7903 transitions. Word has length 67 [2022-11-02 20:56:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:01,226 INFO L495 AbstractCegarLoop]: Abstraction has 5366 states and 7903 transitions. [2022-11-02 20:56:01,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5366 states and 7903 transitions. [2022-11-02 20:56:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:56:01,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:01,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:01,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:01,437 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-11-02 20:56:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:01,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378603989] [2022-11-02 20:56:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:01,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:01,439 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:01,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 20:56:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:56:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:01,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:01,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:56:01,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:56:01,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-02 20:56:01,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:56:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:01,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:56:01,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:01,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378603989] [2022-11-02 20:56:01,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378603989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:01,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:01,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:01,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715977969] [2022-11-02 20:56:01,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:01,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:01,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:01,998 INFO L87 Difference]: Start difference. First operand 5366 states and 7903 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:10,596 INFO L93 Difference]: Finished difference Result 5365 states and 7899 transitions. [2022-11-02 20:56:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:56:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-02 20:56:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:10,602 INFO L225 Difference]: With dead ends: 5365 [2022-11-02 20:56:10,603 INFO L226 Difference]: Without dead ends: 5365 [2022-11-02 20:56:10,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:10,603 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 2 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:10,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5566 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-02 20:56:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2022-11-02 20:56:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 5365. [2022-11-02 20:56:10,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5365 states, 4478 states have (on average 1.7434122376060741) internal successors, (7807), 5319 states have internal predecessors, (7807), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:56:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 7899 transitions. [2022-11-02 20:56:10,651 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 7899 transitions. Word has length 67 [2022-11-02 20:56:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:10,651 INFO L495 AbstractCegarLoop]: Abstraction has 5365 states and 7899 transitions. [2022-11-02 20:56:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 7899 transitions. [2022-11-02 20:56:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:56:10,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:10,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:10,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:10,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:10,869 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:10,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1243544783, now seen corresponding path program 1 times [2022-11-02 20:56:10,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:10,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250903037] [2022-11-02 20:56:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:10,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:10,871 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:10,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:56:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:56:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:11,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:56:11,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:11,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250903037] [2022-11-02 20:56:11,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250903037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:11,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:11,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472215848] [2022-11-02 20:56:11,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:11,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:11,355 INFO L87 Difference]: Start difference. First operand 5365 states and 7899 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:56:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:11,449 INFO L93 Difference]: Finished difference Result 5368 states and 7908 transitions. [2022-11-02 20:56:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-11-02 20:56:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:11,460 INFO L225 Difference]: With dead ends: 5368 [2022-11-02 20:56:11,460 INFO L226 Difference]: Without dead ends: 5368 [2022-11-02 20:56:11,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:11,461 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 2 mSDsluCounter, 4210 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6319 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:11,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6319 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-11-02 20:56:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5368. [2022-11-02 20:56:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 4480 states have (on average 1.7433035714285714) internal successors, (7810), 5322 states have internal predecessors, (7810), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-11-02 20:56:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 7908 transitions. [2022-11-02 20:56:11,525 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 7908 transitions. Word has length 75 [2022-11-02 20:56:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:11,526 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 7908 transitions. [2022-11-02 20:56:11,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:56:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 7908 transitions. [2022-11-02 20:56:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:56:11,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:11,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:11,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:11,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:11,743 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1194961360, now seen corresponding path program 1 times [2022-11-02 20:56:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:11,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037848756] [2022-11-02 20:56:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:11,745 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:11,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 20:56:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:56:12,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037848756] [2022-11-02 20:56:12,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037848756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:12,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:12,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:56:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129621623] [2022-11-02 20:56:12,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:56:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:56:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:12,329 INFO L87 Difference]: Start difference. First operand 5368 states and 7908 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:12,632 INFO L93 Difference]: Finished difference Result 5380 states and 7930 transitions. [2022-11-02 20:56:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:56:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-11-02 20:56:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:12,646 INFO L225 Difference]: With dead ends: 5380 [2022-11-02 20:56:12,647 INFO L226 Difference]: Without dead ends: 5380 [2022-11-02 20:56:12,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:56:12,648 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 12 mSDsluCounter, 12611 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14720 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:12,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14720 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-11-02 20:56:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 5378. [2022-11-02 20:56:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 4489 states have (on average 1.7431499220316329) internal successors, (7825), 5331 states have internal predecessors, (7825), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-11-02 20:56:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 7923 transitions. [2022-11-02 20:56:12,760 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 7923 transitions. Word has length 76 [2022-11-02 20:56:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:12,760 INFO L495 AbstractCegarLoop]: Abstraction has 5378 states and 7923 transitions. [2022-11-02 20:56:12,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 7923 transitions. [2022-11-02 20:56:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-02 20:56:12,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:12,761 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:12,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:12,962 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1708838159, now seen corresponding path program 2 times [2022-11-02 20:56:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:12,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342807474] [2022-11-02 20:56:12,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:56:12,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:12,964 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:12,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 20:56:13,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:56:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:56:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:13,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:13,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342807474] [2022-11-02 20:56:13,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342807474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:13,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:13,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-02 20:56:13,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811485937] [2022-11-02 20:56:13,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:13,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:56:13,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:13,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:56:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:56:13,919 INFO L87 Difference]: Start difference. First operand 5378 states and 7923 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:15,000 INFO L93 Difference]: Finished difference Result 5399 states and 7971 transitions. [2022-11-02 20:56:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:56:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-11-02 20:56:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:15,016 INFO L225 Difference]: With dead ends: 5399 [2022-11-02 20:56:15,016 INFO L226 Difference]: Without dead ends: 5395 [2022-11-02 20:56:15,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:56:15,017 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 56 mSDsluCounter, 16839 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 18951 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:15,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 18951 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:56:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-11-02 20:56:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5387. [2022-11-02 20:56:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 4498 states have (on average 1.7423299244108492) internal successors, (7837), 5340 states have internal predecessors, (7837), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-11-02 20:56:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 7935 transitions. [2022-11-02 20:56:15,128 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 7935 transitions. Word has length 79 [2022-11-02 20:56:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:15,128 INFO L495 AbstractCegarLoop]: Abstraction has 5387 states and 7935 transitions. [2022-11-02 20:56:15,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 7935 transitions. [2022-11-02 20:56:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-02 20:56:15,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:15,129 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:15,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-02 20:56:15,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:15,347 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1472099985, now seen corresponding path program 3 times [2022-11-02 20:56:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665864652] [2022-11-02 20:56:15,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:56:15,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:15,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:15,350 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:15,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-02 20:56:16,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:56:16,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:56:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:16,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:17,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:17,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665864652] [2022-11-02 20:56:17,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665864652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:17,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:17,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-02 20:56:17,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32894339] [2022-11-02 20:56:17,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:56:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:56:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:56:17,435 INFO L87 Difference]: Start difference. First operand 5387 states and 7935 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:22,413 INFO L93 Difference]: Finished difference Result 5429 states and 8072 transitions. [2022-11-02 20:56:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:56:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-11-02 20:56:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:22,424 INFO L225 Difference]: With dead ends: 5429 [2022-11-02 20:56:22,425 INFO L226 Difference]: Without dead ends: 5423 [2022-11-02 20:56:22,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:56:22,426 INFO L413 NwaCegarLoop]: 2116 mSDtfsCounter, 189 mSDsluCounter, 23219 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 25335 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:22,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 25335 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-02 20:56:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2022-11-02 20:56:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 5405. [2022-11-02 20:56:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 4516 states have (on average 1.7404782993799823) internal successors, (7860), 5358 states have internal predecessors, (7860), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-11-02 20:56:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 7958 transitions. [2022-11-02 20:56:22,495 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 7958 transitions. Word has length 85 [2022-11-02 20:56:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:22,495 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 7958 transitions. [2022-11-02 20:56:22,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 7958 transitions. [2022-11-02 20:56:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 20:56:22,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:22,497 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:22,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:22,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:22,713 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1934666287, now seen corresponding path program 4 times [2022-11-02 20:56:22,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:22,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464961435] [2022-11-02 20:56:22,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:56:22,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:22,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:22,715 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:22,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 20:56:23,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:56:23,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:56:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:23,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:26,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:26,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464961435] [2022-11-02 20:56:26,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464961435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:26,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:26,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-02 20:56:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109832078] [2022-11-02 20:56:26,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:26,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-02 20:56:26,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-02 20:56:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:56:26,051 INFO L87 Difference]: Start difference. First operand 5405 states and 7958 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:43,687 INFO L93 Difference]: Finished difference Result 5485 states and 8175 transitions. [2022-11-02 20:56:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-02 20:56:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-11-02 20:56:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:43,701 INFO L225 Difference]: With dead ends: 5485 [2022-11-02 20:56:43,701 INFO L226 Difference]: Without dead ends: 5481 [2022-11-02 20:56:43,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-11-02 20:56:43,704 INFO L413 NwaCegarLoop]: 2129 mSDtfsCounter, 406 mSDsluCounter, 48856 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 50985 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:43,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 50985 Invalid, 3467 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [460 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-02 20:56:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2022-11-02 20:56:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5439. [2022-11-02 20:56:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 4550 states have (on average 1.7375824175824175) internal successors, (7906), 5392 states have internal predecessors, (7906), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-11-02 20:56:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 8004 transitions. [2022-11-02 20:56:43,778 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 8004 transitions. Word has length 97 [2022-11-02 20:56:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:43,779 INFO L495 AbstractCegarLoop]: Abstraction has 5439 states and 8004 transitions. [2022-11-02 20:56:43,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:56:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 8004 transitions. [2022-11-02 20:56:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-02 20:56:43,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:43,782 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:43,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:43,999 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-11-02 20:56:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1997795441, now seen corresponding path program 5 times [2022-11-02 20:56:44,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:44,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122655347] [2022-11-02 20:56:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:56:44,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:44,002 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:44,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-02 20:56:45,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-11-02 20:56:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-02 20:56:45,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:45,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:56:45,882 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 20:56:45,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-02 20:56:45,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:56:46,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-02 20:56:46,896 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| v_arrayElimCell_19) (_ bv1 1))) (= (bvadd (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|) (_ bv1 1)) (_ bv0 1)) (not (= v_arrayElimCell_19 |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|)))) (exists ((v_ArrVal_2639 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_2639)))) is different from true [2022-11-02 20:56:47,216 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| v_arrayElimCell_19) (_ bv1 1))) (= (bvadd (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|) (_ bv1 1)) (_ bv0 1)) (not (= v_arrayElimCell_19 |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|)))) (exists ((v_ArrVal_2647 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_2647) |c_#memory_$Pointer$.base|))) is different from true [2022-11-02 20:56:47,713 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| v_arrayElimCell_19) (_ bv1 1))) (= (bvadd (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|) (_ bv1 1)) (_ bv0 1)) (not (= v_arrayElimCell_19 |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|)))) (exists ((v_ArrVal_2659 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_2659)))) is different from true [2022-11-02 20:56:47,804 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| v_arrayElimCell_19) (_ bv1 1))) (= (bvadd (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|) (_ bv1 1)) (_ bv0 1)) (not (= v_arrayElimCell_19 |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|)))) (exists ((v_ArrVal_2662 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_2662) |c_#memory_$Pointer$.base|))) is different from true [2022-11-02 20:56:47,902 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| v_arrayElimCell_19) (_ bv1 1))) (= (bvadd (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|) (_ bv1 1)) (_ bv0 1)) (not (= v_arrayElimCell_19 |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|)))) (exists ((v_ArrVal_2665 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_2665)))) is different from true [2022-11-02 20:56:48,024 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:56:48,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-02 20:56:48,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2022-11-02 20:56:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 741 trivial. 210 not checked. [2022-11-02 20:56:48,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:48,460 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2712 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_2712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1)))) is different from false [2022-11-02 20:56:48,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122655347] [2022-11-02 20:56:48,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122655347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579449782] [2022-11-02 20:56:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:56:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:56:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:56:48,465 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:56:48,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fcb2ef-fe55-4660-b803-42da141df208/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process