./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/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_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/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_84fbc97d-c459-44fd-a119-36eb17a938ff/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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- 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 21:07:59,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:07:59,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:07:59,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:07:59,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:07:59,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:07:59,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:07:59,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:07:59,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:07:59,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:07:59,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:07:59,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:07:59,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:07:59,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:07:59,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:07:59,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:07:59,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:07:59,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:07:59,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:07:59,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:07:59,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:07:59,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:07:59,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:07:59,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:07:59,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:07:59,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:07:59,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:07:59,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:07:59,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:07:59,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:07:59,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:07:59,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:07:59,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:07:59,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:07:59,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:07:59,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:07:59,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:07:59,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:07:59,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:07:59,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:07:59,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:07:59,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 21:07:59,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:07:59,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:07:59,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:07:59,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:07:59,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:07:59,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:07:59,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:07:59,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:07:59,247 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:07:59,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:07:59,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:07:59,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 21:07:59,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:07:59,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:07:59,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:07:59,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 21:07:59,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 21:07:59,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 21:07:59,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:07:59,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:07:59,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:07:59,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:07:59,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:07:59,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:07:59,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:07:59,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:59,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:07:59,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:07:59,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:07:59,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:07:59,254 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_84fbc97d-c459-44fd-a119-36eb17a938ff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2022-11-02 21:07:59,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:07:59,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:07:59,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:07:59,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:07:59,632 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:07:59,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-11-02 21:07:59,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/dcac34016/597cf8d40b83493387eeb322ced83db1/FLAG7078fcebb [2022-11-02 21:08:00,351 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:00,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-11-02 21:08:00,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/dcac34016/597cf8d40b83493387eeb322ced83db1/FLAG7078fcebb [2022-11-02 21:08:00,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/dcac34016/597cf8d40b83493387eeb322ced83db1 [2022-11-02 21:08:00,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:00,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:00,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:00,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:00,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:00,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:00" (1/1) ... [2022-11-02 21:08:00,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b87a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:00, skipping insertion in model container [2022-11-02 21:08:00,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:00" (1/1) ... [2022-11-02 21:08:00,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:00,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:01,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:01,286 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 21:08:01,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41b590d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:01, skipping insertion in model container [2022-11-02 21:08:01,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:01,292 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-02 21:08:01,295 INFO L158 Benchmark]: Toolchain (without parser) took 715.11ms. Allocated memory is still 140.5MB. Free memory was 107.8MB in the beginning and 110.8MB in the end (delta: -3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 21:08:01,297 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:08:01,298 INFO L158 Benchmark]: CACSL2BoogieTranslator took 709.00ms. Allocated memory is still 140.5MB. Free memory was 107.4MB in the beginning and 110.8MB in the end (delta: -3.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 21:08:01,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 709.00ms. Allocated memory is still 140.5MB. Free memory was 107.4MB in the beginning and 110.8MB in the end (delta: -3.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/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_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/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_84fbc97d-c459-44fd-a119-36eb17a938ff/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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- 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 21:08:03,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:08:03,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:08:03,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:08:03,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:08:03,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:08:03,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:08:03,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:08:03,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:08:03,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:08:03,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:08:03,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:08:03,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:08:03,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:08:03,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:08:03,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:08:03,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:08:03,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:08:03,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:08:03,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:08:03,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:08:03,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:08:03,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:08:03,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:08:03,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:08:03,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:08:03,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:08:03,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:08:03,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:08:03,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:08:03,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:08:03,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:08:03,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:08:03,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:08:03,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:08:03,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:08:03,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:08:03,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:08:03,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:08:03,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:08:03,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:08:03,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-02 21:08:03,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:08:03,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:08:03,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:08:03,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:08:03,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:08:03,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:08:03,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:08:03,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:08:03,861 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:08:03,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:08:03,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:08:03,862 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 21:08:03,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:08:03,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:08:03,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:08:03,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 21:08:03,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 21:08:03,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 21:08:03,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:08:03,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:08:03,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 21:08:03,865 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 21:08:03,866 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:08:03,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:08:03,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:08:03,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:08:03,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:08:03,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:03,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:08:03,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:08:03,869 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 21:08:03,869 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 21:08:03,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 21:08:03,870 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_84fbc97d-c459-44fd-a119-36eb17a938ff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2022-11-02 21:08:04,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:08:04,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:08:04,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:08:04,306 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:08:04,309 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:08:04,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-11-02 21:08:04,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/d1c74d7fa/e51c6392765a47b99f8e91e38720b0e7/FLAG01ed149e6 [2022-11-02 21:08:05,045 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:05,046 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-11-02 21:08:05,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/d1c74d7fa/e51c6392765a47b99f8e91e38720b0e7/FLAG01ed149e6 [2022-11-02 21:08:05,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/data/d1c74d7fa/e51c6392765a47b99f8e91e38720b0e7 [2022-11-02 21:08:05,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:05,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:05,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:05,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:05,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:05,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:05" (1/1) ... [2022-11-02 21:08:05,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ee03f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:05, skipping insertion in model container [2022-11-02 21:08:05,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:05" (1/1) ... [2022-11-02 21:08:05,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:05,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:06,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:06,051 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 21:08:06,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:06,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:06,188 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:08:06,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:06,330 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:08:06,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06 WrapperNode [2022-11-02 21:08:06,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:06,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:06,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:08:06,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:08:06,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,401 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 331 [2022-11-02 21:08:06,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:06,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:08:06,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:08:06,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:08:06,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:08:06,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:08:06,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:08:06,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:08:06,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (1/1) ... [2022-11-02 21:08:06,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:06,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:08:06,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:08:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-02 21:08:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-02 21:08:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-02 21:08:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-02 21:08:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-02 21:08:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-02 21:08:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-11-02 21:08:06,585 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-11-02 21:08:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-11-02 21:08:06,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-11-02 21:08:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 21:08:06,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 21:08:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-02 21:08:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-02 21:08:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:08:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:08:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2022-11-02 21:08:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2022-11-02 21:08:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:08:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:08:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-02 21:08:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:08:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-02 21:08:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:08:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:08:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-02 21:08:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-02 21:08:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:08:06,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:08:06,965 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:08:06,967 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:08:06,973 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 21:08:08,542 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:08:08,552 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:08:08,553 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:08:08,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:08 BoogieIcfgContainer [2022-11-02 21:08:08,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:08:08,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:08:08,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:08:08,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:08:08,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:08:05" (1/3) ... [2022-11-02 21:08:08,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cd925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:08, skipping insertion in model container [2022-11-02 21:08:08,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:06" (2/3) ... [2022-11-02 21:08:08,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cd925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:08, skipping insertion in model container [2022-11-02 21:08:08,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:08" (3/3) ... [2022-11-02 21:08:08,567 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test12-1.i [2022-11-02 21:08:08,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:08:08,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2022-11-02 21:08:08,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:08,670 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;@5ef8b0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:08,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-11-02 21:08:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 21:08:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:08:08,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:08,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:08,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2022-11-02 21:08:08,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:08,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094343167] [2022-11-02 21:08:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:08,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:08,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:08,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 21:08:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:08:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:09,149 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 21:08:09,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:09,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:09,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094343167] [2022-11-02 21:08:09,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094343167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:09,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:09,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924518836] [2022-11-02 21:08:09,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:09,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:08:09,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:08:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:09,208 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:08:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:10,582 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2022-11-02 21:08:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:08:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2022-11-02 21:08:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:10,615 INFO L225 Difference]: With dead ends: 412 [2022-11-02 21:08:10,626 INFO L226 Difference]: Without dead ends: 408 [2022-11-02 21:08:10,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:10,644 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:10,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 522 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:08:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-02 21:08:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2022-11-02 21:08:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-02 21:08:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2022-11-02 21:08:10,763 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2022-11-02 21:08:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:10,764 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2022-11-02 21:08:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:08:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2022-11-02 21:08:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:08:10,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:10,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:10,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:10,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:10,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2022-11-02 21:08:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968961205] [2022-11-02 21:08:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:10,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:10,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:10,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:10,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 21:08:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:08:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:11,317 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 21:08:11,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:11,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968961205] [2022-11-02 21:08:11,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968961205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:11,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:11,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493573981] [2022-11-02 21:08:11,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:08:11,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:08:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:11,332 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:08:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:12,747 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2022-11-02 21:08:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:08:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2022-11-02 21:08:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:12,753 INFO L225 Difference]: With dead ends: 476 [2022-11-02 21:08:12,753 INFO L226 Difference]: Without dead ends: 476 [2022-11-02 21:08:12,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:12,758 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:12,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 849 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 21:08:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-02 21:08:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2022-11-02 21:08:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-02 21:08:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2022-11-02 21:08:12,821 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2022-11-02 21:08:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:12,822 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2022-11-02 21:08:12,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:08:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2022-11-02 21:08:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:08:12,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:12,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:12,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:13,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:13,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:13,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2022-11-02 21:08:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:13,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089395034] [2022-11-02 21:08:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:13,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:13,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 21:08:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:13,207 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 21:08:13,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:13,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089395034] [2022-11-02 21:08:13,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089395034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:13,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:13,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:08:13,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226513748] [2022-11-02 21:08:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:13,211 INFO L87 Difference]: Start difference. First operand 407 states and 520 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 21:08:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:13,452 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2022-11-02 21:08:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:08:13,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2022-11-02 21:08:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:13,457 INFO L225 Difference]: With dead ends: 649 [2022-11-02 21:08:13,457 INFO L226 Difference]: Without dead ends: 649 [2022-11-02 21:08:13,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:13,459 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:13,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1486 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:08:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-02 21:08:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2022-11-02 21:08:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-02 21:08:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2022-11-02 21:08:13,483 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2022-11-02 21:08:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:13,483 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2022-11-02 21:08:13,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 21:08:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2022-11-02 21:08:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:08:13,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:13,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:13,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:13,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:13,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2022-11-02 21:08:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473016842] [2022-11-02 21:08:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:13,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:13,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:13,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 21:08:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:13,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:08:13,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:14,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:08:14,099 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 21:08:14,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:14,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473016842] [2022-11-02 21:08:14,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473016842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:14,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:14,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:08:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885632430] [2022-11-02 21:08:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:08:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:08:14,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:08:14,103 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:08:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:15,783 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-11-02 21:08:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:08:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 21:08:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:15,788 INFO L225 Difference]: With dead ends: 436 [2022-11-02 21:08:15,788 INFO L226 Difference]: Without dead ends: 436 [2022-11-02 21:08:15,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:15,790 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 59 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1152 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:08:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-02 21:08:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2022-11-02 21:08:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-02 21:08:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-11-02 21:08:15,823 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2022-11-02 21:08:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:15,825 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-11-02 21:08:15,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:08:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-11-02 21:08:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:08:15,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:15,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:15,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:16,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:16,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2022-11-02 21:08:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:16,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194525279] [2022-11-02 21:08:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:16,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:16,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:16,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 21:08:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:08:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:16,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:08:16,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:08:16,512 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 21:08:16,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:16,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:16,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194525279] [2022-11-02 21:08:16,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194525279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:16,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:16,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:08:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107760889] [2022-11-02 21:08:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:16,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:08:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:08:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:08:16,514 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:08:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:18,419 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2022-11-02 21:08:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:08:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 21:08:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:18,423 INFO L225 Difference]: With dead ends: 424 [2022-11-02 21:08:18,423 INFO L226 Difference]: Without dead ends: 424 [2022-11-02 21:08:18,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:18,425 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 33 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:18,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1291 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-02 21:08:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-02 21:08:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2022-11-02 21:08:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-02 21:08:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2022-11-02 21:08:18,443 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2022-11-02 21:08:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:18,444 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2022-11-02 21:08:18,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:08:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2022-11-02 21:08:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:08:18,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:18,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:18,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-02 21:08:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:18,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2022-11-02 21:08:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:18,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102393270] [2022-11-02 21:08:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:18,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:18,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:18,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:18,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 21:08:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:18,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:08:18,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:18,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:18,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:18,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102393270] [2022-11-02 21:08:18,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102393270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:18,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:18,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:08:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444998700] [2022-11-02 21:08:18,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:18,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:18,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:18,850 INFO L87 Difference]: Start difference. First operand 413 states and 519 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:18,963 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2022-11-02 21:08:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:08:18,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-02 21:08:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:18,966 INFO L225 Difference]: With dead ends: 351 [2022-11-02 21:08:18,966 INFO L226 Difference]: Without dead ends: 351 [2022-11-02 21:08:18,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:18,968 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:18,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1342 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-02 21:08:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2022-11-02 21:08:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:08:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-11-02 21:08:18,983 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2022-11-02 21:08:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:18,983 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-11-02 21:08:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-11-02 21:08:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:08:18,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:18,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:19,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:19,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2022-11-02 21:08:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:19,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276272103] [2022-11-02 21:08:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:19,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:19,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:19,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:19,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 21:08:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:19,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:08:19,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:08:19,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276272103] [2022-11-02 21:08:19,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276272103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:19,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:19,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:08:19,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711553618] [2022-11-02 21:08:19,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:19,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:19,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:19,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:19,407 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:19,524 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2022-11-02 21:08:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:08:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-02 21:08:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:19,527 INFO L225 Difference]: With dead ends: 344 [2022-11-02 21:08:19,528 INFO L226 Difference]: Without dead ends: 344 [2022-11-02 21:08:19,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:19,529 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:19,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1052 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-02 21:08:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-11-02 21:08:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:08:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2022-11-02 21:08:19,543 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2022-11-02 21:08:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:19,544 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2022-11-02 21:08:19,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2022-11-02 21:08:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:08:19,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:19,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:19,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:19,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:19,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2022-11-02 21:08:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029560762] [2022-11-02 21:08:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:19,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:19,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:19,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 21:08:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:08:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:08:19,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:19,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029560762] [2022-11-02 21:08:19,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029560762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:19,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:19,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:08:19,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262896841] [2022-11-02 21:08:19,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:19,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:19,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:19,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:19,934 INFO L87 Difference]: Start difference. First operand 344 states and 386 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:08:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:20,029 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2022-11-02 21:08:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:08:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-02 21:08:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:20,033 INFO L225 Difference]: With dead ends: 388 [2022-11-02 21:08:20,034 INFO L226 Difference]: Without dead ends: 388 [2022-11-02 21:08:20,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:20,035 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:20,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1375 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-02 21:08:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2022-11-02 21:08:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:08:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-11-02 21:08:20,049 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2022-11-02 21:08:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:20,049 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-11-02 21:08:20,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:08:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-11-02 21:08:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:08:20,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:20,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:20,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:20,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:20,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2022-11-02 21:08:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:20,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644016703] [2022-11-02 21:08:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:20,281 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:20,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 21:08:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:08:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:20,427 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 21:08:20,633 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:08:20,634 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 21:08:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:20,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:20,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:20,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644016703] [2022-11-02 21:08:20,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644016703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:20,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:20,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-02 21:08:20,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934862280] [2022-11-02 21:08:20,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:20,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:08:20,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:08:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:08:20,980 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:21,943 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2022-11-02 21:08:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:08:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2022-11-02 21:08:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:21,947 INFO L225 Difference]: With dead ends: 353 [2022-11-02 21:08:21,947 INFO L226 Difference]: Without dead ends: 353 [2022-11-02 21:08:21,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:21,948 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 20 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:21,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1183 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 163 Unchecked, 0.9s Time] [2022-11-02 21:08:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-02 21:08:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2022-11-02 21:08:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 205 states have (on average 1.7414634146341463) internal successors, (357), 324 states have internal predecessors, (357), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:08:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 392 transitions. [2022-11-02 21:08:21,961 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 392 transitions. Word has length 17 [2022-11-02 21:08:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:21,962 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 392 transitions. [2022-11-02 21:08:21,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 392 transitions. [2022-11-02 21:08:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:08:21,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:21,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:21,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:22,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:22,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2022-11-02 21:08:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498182772] [2022-11-02 21:08:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:22,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:22,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:22,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:22,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 21:08:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:08:22,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:22,344 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 21:08:22,353 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 21:08:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:08:24,618 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 21:08:24,633 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:08:24,633 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 21:08:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:24,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:29,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498182772] [2022-11-02 21:08:29,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498182772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192830747] [2022-11-02 21:08:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:29,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:08:29,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:08:29,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:08:29,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-02 21:08:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:08:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:29,315 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 21:08:29,329 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 7 [2022-11-02 21:08:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:08:31,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 21:08:31,527 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:08:31,528 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 21:08:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:31,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:33,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192830747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:33,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:33,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-11-02 21:08:33,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810843528] [2022-11-02 21:08:33,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:33,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:08:33,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:08:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2022-11-02 21:08:33,849 INFO L87 Difference]: Start difference. First operand 350 states and 392 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:38,134 INFO L93 Difference]: Finished difference Result 634 states and 720 transitions. [2022-11-02 21:08:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:08:38,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-02 21:08:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:38,139 INFO L225 Difference]: With dead ends: 634 [2022-11-02 21:08:38,139 INFO L226 Difference]: Without dead ends: 634 [2022-11-02 21:08:38,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2022-11-02 21:08:38,140 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 328 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:38,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1298 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1397 Invalid, 0 Unknown, 319 Unchecked, 4.1s Time] [2022-11-02 21:08:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-02 21:08:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 364. [2022-11-02 21:08:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 216 states have (on average 1.7222222222222223) internal successors, (372), 335 states have internal predecessors, (372), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-02 21:08:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 420 transitions. [2022-11-02 21:08:38,159 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 420 transitions. Word has length 17 [2022-11-02 21:08:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:38,160 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 420 transitions. [2022-11-02 21:08:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 420 transitions. [2022-11-02 21:08:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 21:08:38,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:38,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:38,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:38,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:38,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:08:38,566 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2022-11-02 21:08:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032624776] [2022-11-02 21:08:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:38,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:38,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:38,569 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:38,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 21:08:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:08:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:08:39,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032624776] [2022-11-02 21:08:39,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032624776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:39,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:39,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:08:39,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134960960] [2022-11-02 21:08:39,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:39,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:08:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:08:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:08:39,096 INFO L87 Difference]: Start difference. First operand 364 states and 420 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:08:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:39,930 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2022-11-02 21:08:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:08:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2022-11-02 21:08:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:39,933 INFO L225 Difference]: With dead ends: 367 [2022-11-02 21:08:39,933 INFO L226 Difference]: Without dead ends: 367 [2022-11-02 21:08:39,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:08:39,934 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 578 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:39,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1332 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 27 Unchecked, 0.8s Time] [2022-11-02 21:08:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-02 21:08:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2022-11-02 21:08:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 216 states have (on average 1.712962962962963) internal successors, (370), 334 states have internal predecessors, (370), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-02 21:08:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 418 transitions. [2022-11-02 21:08:39,946 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 418 transitions. Word has length 18 [2022-11-02 21:08:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:39,946 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 418 transitions. [2022-11-02 21:08:39,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:08:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 418 transitions. [2022-11-02 21:08:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 21:08:39,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:39,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:39,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:40,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:40,160 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2022-11-02 21:08:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:40,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689121751] [2022-11-02 21:08:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:40,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:40,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 21:08:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:40,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:40,343 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 21:08:40,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:40,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689121751] [2022-11-02 21:08:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689121751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:40,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:40,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847802304] [2022-11-02 21:08:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:08:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:08:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:40,345 INFO L87 Difference]: Start difference. First operand 363 states and 418 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 21:08:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:41,268 INFO L93 Difference]: Finished difference Result 366 states and 420 transitions. [2022-11-02 21:08:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:08:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 18 [2022-11-02 21:08:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:41,272 INFO L225 Difference]: With dead ends: 366 [2022-11-02 21:08:41,272 INFO L226 Difference]: Without dead ends: 353 [2022-11-02 21:08:41,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:41,273 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:41,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:08:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-02 21:08:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-11-02 21:08:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 207 states have (on average 1.7391304347826086) internal successors, (360), 325 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-02 21:08:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2022-11-02 21:08:41,294 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 18 [2022-11-02 21:08:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:41,295 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2022-11-02 21:08:41,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 21:08:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2022-11-02 21:08:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:08:41,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:41,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:41,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:41,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:41,510 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2022-11-02 21:08:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:41,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855500162] [2022-11-02 21:08:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:41,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:41,513 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:41,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 21:08:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:41,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:08:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:41,791 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:08:41,791 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 21:08:42,014 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 14 treesize of output 20 [2022-11-02 21:08:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:08:42,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:42,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:42,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855500162] [2022-11-02 21:08:42,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855500162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:42,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22329731] [2022-11-02 21:08:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:42,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:08:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:08:42,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:08:42,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-02 21:08:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:08:42,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:42,325 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 9 treesize of output 3 [2022-11-02 21:08:42,426 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:08:42,426 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 21:08:42,549 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 14 treesize of output 20 [2022-11-02 21:08:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:08:42,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:42,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [22329731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:42,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:42,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-02 21:08:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926915227] [2022-11-02 21:08:42,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:42,657 INFO L87 Difference]: Start difference. First operand 353 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:43,781 INFO L93 Difference]: Finished difference Result 403 states and 459 transitions. [2022-11-02 21:08:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:08:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-02 21:08:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:43,785 INFO L225 Difference]: With dead ends: 403 [2022-11-02 21:08:43,785 INFO L226 Difference]: Without dead ends: 403 [2022-11-02 21:08:43,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:08:43,786 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 99 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:43,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 936 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 345 Invalid, 0 Unknown, 185 Unchecked, 1.1s Time] [2022-11-02 21:08:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-02 21:08:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2022-11-02 21:08:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 212 states have (on average 1.7264150943396226) internal successors, (366), 330 states have internal predecessors, (366), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-02 21:08:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-11-02 21:08:43,799 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 21 [2022-11-02 21:08:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:43,800 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-11-02 21:08:43,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:08:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-11-02 21:08:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:08:43,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:43,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:43,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:44,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:44,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:08:44,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:08:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2022-11-02 21:08:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:08:44,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222511143] [2022-11-02 21:08:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:44,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:08:44,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:08:44,212 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:08:44,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 21:08:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:08:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:46,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:08:46,506 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 21:08:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:48,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:53,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:08:53,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222511143] [2022-11-02 21:08:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222511143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806624154] [2022-11-02 21:08:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:53,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:08:53,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:08:53,383 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:08:53,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-02 21:08:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:08:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:53,597 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 9 treesize of output 3 [2022-11-02 21:08:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:08:55,743 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 21:08:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:55,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:56,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806624154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:56,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:56,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-02 21:08:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710218446] [2022-11-02 21:08:56,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:56,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:56,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:08:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2022-11-02 21:08:56,423 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:09:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:02,394 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2022-11-02 21:09:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:09:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-02 21:09:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:02,398 INFO L225 Difference]: With dead ends: 449 [2022-11-02 21:09:02,398 INFO L226 Difference]: Without dead ends: 449 [2022-11-02 21:09:02,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=60, Invalid=118, Unknown=4, NotChecked=0, Total=182 [2022-11-02 21:09:02,399 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:02,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1095 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 499 Invalid, 0 Unknown, 205 Unchecked, 1.8s Time] [2022-11-02 21:09:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-02 21:09:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2022-11-02 21:09:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 236 states have (on average 1.7415254237288136) internal successors, (411), 354 states have internal predecessors, (411), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:09:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 460 transitions. [2022-11-02 21:09:02,419 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 460 transitions. Word has length 21 [2022-11-02 21:09:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:02,421 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 460 transitions. [2022-11-02 21:09:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:09:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 460 transitions. [2022-11-02 21:09:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:09:02,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:02,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:02,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:02,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:02,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:09:02,838 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:02,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2128978739, now seen corresponding path program 1 times [2022-11-02 21:09:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459420880] [2022-11-02 21:09:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:02,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:02,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:02,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:02,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 21:09:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:09:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:02,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:02,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:02,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459420880] [2022-11-02 21:09:02,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459420880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:02,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:02,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:09:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445780151] [2022-11-02 21:09:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:02,989 INFO L87 Difference]: Start difference. First operand 384 states and 460 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:03,110 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2022-11-02 21:09:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-11-02 21:09:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:03,118 INFO L225 Difference]: With dead ends: 397 [2022-11-02 21:09:03,118 INFO L226 Difference]: Without dead ends: 397 [2022-11-02 21:09:03,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:03,119 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 252 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:03,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1222 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-02 21:09:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2022-11-02 21:09:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.7467811158798283) internal successors, (407), 351 states have internal predecessors, (407), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:09:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2022-11-02 21:09:03,132 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 21 [2022-11-02 21:09:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:03,132 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2022-11-02 21:09:03,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2022-11-02 21:09:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 21:09:03,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:03,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:03,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:03,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:03,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2022-11-02 21:09:03,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:03,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585224606] [2022-11-02 21:09:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:03,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:03,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:03,351 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:03,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 21:09:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:09:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:03,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:09:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:09:03,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:03,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585224606] [2022-11-02 21:09:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585224606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:03,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:03,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:09:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941468624] [2022-11-02 21:09:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:03,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:03,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:03,608 INFO L87 Difference]: Start difference. First operand 381 states and 456 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:04,865 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2022-11-02 21:09:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:09:04,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-02 21:09:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:04,870 INFO L225 Difference]: With dead ends: 422 [2022-11-02 21:09:04,870 INFO L226 Difference]: Without dead ends: 422 [2022-11-02 21:09:04,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 21:09:04,871 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:04,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1033 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:09:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-02 21:09:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 381. [2022-11-02 21:09:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.742489270386266) internal successors, (406), 351 states have internal predecessors, (406), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:09:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2022-11-02 21:09:04,884 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 23 [2022-11-02 21:09:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:04,884 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2022-11-02 21:09:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2022-11-02 21:09:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 21:09:04,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:04,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:04,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:05,100 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2022-11-02 21:09:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:05,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918896693] [2022-11-02 21:09:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:05,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:05,103 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:05,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 21:09:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:09:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:05,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:09:05,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:09:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:09:05,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:05,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918896693] [2022-11-02 21:09:05,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918896693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:05,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:05,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:09:05,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697471836] [2022-11-02 21:09:05,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:05,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:05,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:05,575 INFO L87 Difference]: Start difference. First operand 381 states and 455 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:06,903 INFO L93 Difference]: Finished difference Result 403 states and 477 transitions. [2022-11-02 21:09:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:09:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-02 21:09:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:06,906 INFO L225 Difference]: With dead ends: 403 [2022-11-02 21:09:06,907 INFO L226 Difference]: Without dead ends: 403 [2022-11-02 21:09:06,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 21:09:06,908 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 39 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:06,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1084 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:09:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-02 21:09:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 381. [2022-11-02 21:09:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.738197424892704) internal successors, (405), 351 states have internal predecessors, (405), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:09:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2022-11-02 21:09:06,918 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 23 [2022-11-02 21:09:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:06,919 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2022-11-02 21:09:06,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2022-11-02 21:09:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:09:06,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:06,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:06,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:07,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:07,134 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2022-11-02 21:09:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476579739] [2022-11-02 21:09:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:07,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:07,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:07,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 21:09:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:09:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:09:07,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:09:07,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:07,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476579739] [2022-11-02 21:09:07,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476579739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:07,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:07,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:09:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052852447] [2022-11-02 21:09:07,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:07,391 INFO L87 Difference]: Start difference. First operand 381 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:09:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:07,492 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2022-11-02 21:09:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-02 21:09:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:07,495 INFO L225 Difference]: With dead ends: 380 [2022-11-02 21:09:07,496 INFO L226 Difference]: Without dead ends: 380 [2022-11-02 21:09:07,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:07,497 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 248 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:07,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1055 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-02 21:09:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-11-02 21:09:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 233 states have (on average 1.7339055793991416) internal successors, (404), 350 states have internal predecessors, (404), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:09:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-11-02 21:09:07,508 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 25 [2022-11-02 21:09:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:07,509 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-11-02 21:09:07,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:09:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-11-02 21:09:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:09:07,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:07,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:07,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:07,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:07,724 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2022-11-02 21:09:07,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:07,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89840509] [2022-11-02 21:09:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:07,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:07,726 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:07,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 21:09:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:09:07,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:09:07,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:07,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89840509] [2022-11-02 21:09:07,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89840509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:07,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:07,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:09:07,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461419101] [2022-11-02 21:09:07,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:07,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:07,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:07,891 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:09:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:07,962 INFO L93 Difference]: Finished difference Result 415 states and 481 transitions. [2022-11-02 21:09:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-02 21:09:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:07,965 INFO L225 Difference]: With dead ends: 415 [2022-11-02 21:09:07,965 INFO L226 Difference]: Without dead ends: 415 [2022-11-02 21:09:07,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:07,966 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 44 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:07,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1438 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-02 21:09:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2022-11-02 21:09:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 226 states have (on average 1.7345132743362832) internal successors, (392), 343 states have internal predecessors, (392), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-02 21:09:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 435 transitions. [2022-11-02 21:09:07,976 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 435 transitions. Word has length 25 [2022-11-02 21:09:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:07,977 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 435 transitions. [2022-11-02 21:09:07,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:09:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 435 transitions. [2022-11-02 21:09:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:09:07,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:07,978 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:07,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:08,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:08,191 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2022-11-02 21:09:08,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:08,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729113091] [2022-11-02 21:09:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:08,192 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:08,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 21:09:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:09:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:08,336 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 21:09:08,469 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 21:09:08,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:09:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:08,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:08,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:08,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729113091] [2022-11-02 21:09:08,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729113091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:08,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:08,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-02 21:09:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008381976] [2022-11-02 21:09:08,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:09:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:09:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:09:08,757 INFO L87 Difference]: Start difference. First operand 371 states and 435 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:09:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:11,213 INFO L93 Difference]: Finished difference Result 515 states and 605 transitions. [2022-11-02 21:09:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:09:11,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-11-02 21:09:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:11,216 INFO L225 Difference]: With dead ends: 515 [2022-11-02 21:09:11,216 INFO L226 Difference]: Without dead ends: 515 [2022-11-02 21:09:11,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:09:11,217 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 182 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:11,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1304 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 733 Invalid, 0 Unknown, 223 Unchecked, 2.4s Time] [2022-11-02 21:09:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-02 21:09:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 373. [2022-11-02 21:09:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 229 states have (on average 1.724890829694323) internal successors, (395), 345 states have internal predecessors, (395), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-02 21:09:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 438 transitions. [2022-11-02 21:09:11,240 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 438 transitions. Word has length 25 [2022-11-02 21:09:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:11,242 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 438 transitions. [2022-11-02 21:09:11,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:09:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 438 transitions. [2022-11-02 21:09:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:09:11,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:11,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:11,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-02 21:09:11,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:11,459 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2022-11-02 21:09:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:11,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22244704] [2022-11-02 21:09:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:11,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:11,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:11,461 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:11,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 21:09:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:09:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:11,625 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 21:09:15,902 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 21:09:15,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:09:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:15,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:16,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:16,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22244704] [2022-11-02 21:09:16,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22244704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1865671149] [2022-11-02 21:09:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:16,343 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:09:16,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:09:16,345 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:09:16,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-02 21:09:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:16,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:09:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:16,564 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 21:09:16,574 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 21:09:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:20,968 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 21:09:20,986 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:09:20,986 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 21:09:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:21,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:23,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1865671149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:23,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:23,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-02 21:09:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133281610] [2022-11-02 21:09:23,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:23,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:09:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:09:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=225, Unknown=4, NotChecked=0, Total=272 [2022-11-02 21:09:23,392 INFO L87 Difference]: Start difference. First operand 373 states and 438 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:09:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:32,209 INFO L93 Difference]: Finished difference Result 645 states and 746 transitions. [2022-11-02 21:09:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:09:32,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-11-02 21:09:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:32,214 INFO L225 Difference]: With dead ends: 645 [2022-11-02 21:09:32,214 INFO L226 Difference]: Without dead ends: 645 [2022-11-02 21:09:32,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=56, Invalid=280, Unknown=6, NotChecked=0, Total=342 [2022-11-02 21:09:32,215 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 507 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:32,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2273 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1698 Invalid, 0 Unknown, 549 Unchecked, 4.6s Time] [2022-11-02 21:09:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-02 21:09:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 372. [2022-11-02 21:09:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 229 states have (on average 1.720524017467249) internal successors, (394), 344 states have internal predecessors, (394), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-02 21:09:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2022-11-02 21:09:32,226 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 25 [2022-11-02 21:09:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:32,226 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2022-11-02 21:09:32,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:09:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2022-11-02 21:09:32,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 21:09:32,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:32,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:32,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:32,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:32,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:32,631 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2022-11-02 21:09:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850980942] [2022-11-02 21:09:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:32,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:32,634 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:32,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 21:09:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:09:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:09:33,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:09:33,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:33,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850980942] [2022-11-02 21:09:33,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850980942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:33,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:33,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:09:33,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194001263] [2022-11-02 21:09:33,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:33,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:09:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:09:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:09:33,301 INFO L87 Difference]: Start difference. First operand 372 states and 437 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 21:09:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:33,673 INFO L93 Difference]: Finished difference Result 606 states and 700 transitions. [2022-11-02 21:09:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:09:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-11-02 21:09:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:33,676 INFO L225 Difference]: With dead ends: 606 [2022-11-02 21:09:33,676 INFO L226 Difference]: Without dead ends: 606 [2022-11-02 21:09:33,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:09:33,677 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 324 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:33,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 2300 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 207 Unchecked, 0.3s Time] [2022-11-02 21:09:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-02 21:09:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 473. [2022-11-02 21:09:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 316 states have (on average 1.7563291139240507) internal successors, (555), 431 states have internal predecessors, (555), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2022-11-02 21:09:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 623 transitions. [2022-11-02 21:09:33,691 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 623 transitions. Word has length 26 [2022-11-02 21:09:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:33,691 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 623 transitions. [2022-11-02 21:09:33,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 21:09:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 623 transitions. [2022-11-02 21:09:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 21:09:33,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:33,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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 21:09:33,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:33,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:33,905 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:33,906 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2022-11-02 21:09:33,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:33,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393283540] [2022-11-02 21:09:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:33,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:33,908 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:33,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 21:09:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:09:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:34,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:09:34,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:09:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:09:34,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:34,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393283540] [2022-11-02 21:09:34,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393283540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:34,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:34,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:09:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358582339] [2022-11-02 21:09:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:34,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:34,445 INFO L87 Difference]: Start difference. First operand 473 states and 623 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:35,100 INFO L93 Difference]: Finished difference Result 455 states and 584 transitions. [2022-11-02 21:09:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-02 21:09:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:35,105 INFO L225 Difference]: With dead ends: 455 [2022-11-02 21:09:35,105 INFO L226 Difference]: Without dead ends: 455 [2022-11-02 21:09:35,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 21:09:35,106 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 12 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:35,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1249 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:09:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-02 21:09:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2022-11-02 21:09:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 296 states have (on average 1.739864864864865) internal successors, (515), 411 states have internal predecessors, (515), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-02 21:09:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 581 transitions. [2022-11-02 21:09:35,123 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 581 transitions. Word has length 26 [2022-11-02 21:09:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:35,123 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 581 transitions. [2022-11-02 21:09:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:09:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 581 transitions. [2022-11-02 21:09:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:09:35,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:35,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:35,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:35,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:35,337 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:35,338 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2022-11-02 21:09:35,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:35,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162579444] [2022-11-02 21:09:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:35,340 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:35,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 21:09:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:09:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:35,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:40,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162579444] [2022-11-02 21:09:40,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162579444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147877116] [2022-11-02 21:09:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:40,053 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:09:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:09:40,054 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:09:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-02 21:09:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:09:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:40,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147877116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:44,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:44,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-02 21:09:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414227758] [2022-11-02 21:09:44,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:09:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:09:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-11-02 21:09:44,863 INFO L87 Difference]: Start difference. First operand 451 states and 581 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:09:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:46,203 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-11-02 21:09:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:09:46,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-11-02 21:09:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:46,206 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:09:46,206 INFO L226 Difference]: Without dead ends: 438 [2022-11-02 21:09:46,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-11-02 21:09:46,206 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 60 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:46,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1944 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 637 Unchecked, 1.3s Time] [2022-11-02 21:09:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-02 21:09:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-11-02 21:09:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 284 states have (on average 1.767605633802817) internal successors, (502), 399 states have internal predecessors, (502), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:09:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 567 transitions. [2022-11-02 21:09:46,218 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 567 transitions. Word has length 28 [2022-11-02 21:09:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:46,218 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 567 transitions. [2022-11-02 21:09:46,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:09:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 567 transitions. [2022-11-02 21:09:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 21:09:46,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:46,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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 21:09:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:46,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:46,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:46,623 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2022-11-02 21:09:46,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:46,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595444310] [2022-11-02 21:09:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:46,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:46,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:46,625 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:46,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 21:09:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:09:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:46,743 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 21:09:46,896 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:09:46,896 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 21:09:47,045 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 14 treesize of output 20 [2022-11-02 21:09:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:47,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:09:47,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:47,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595444310] [2022-11-02 21:09:47,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595444310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:47,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:47,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-11-02 21:09:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074202188] [2022-11-02 21:09:47,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:47,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:09:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:09:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:09:47,518 INFO L87 Difference]: Start difference. First operand 438 states and 567 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:09:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:52,947 INFO L93 Difference]: Finished difference Result 736 states and 847 transitions. [2022-11-02 21:09:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:09:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2022-11-02 21:09:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:52,952 INFO L225 Difference]: With dead ends: 736 [2022-11-02 21:09:52,953 INFO L226 Difference]: Without dead ends: 736 [2022-11-02 21:09:52,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:09:52,953 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 466 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:52,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2948 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2060 Invalid, 0 Unknown, 483 Unchecked, 5.3s Time] [2022-11-02 21:09:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-02 21:09:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 444. [2022-11-02 21:09:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 290 states have (on average 1.7517241379310344) internal successors, (508), 404 states have internal predecessors, (508), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:09:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 573 transitions. [2022-11-02 21:09:52,968 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 573 transitions. Word has length 30 [2022-11-02 21:09:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:52,969 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 573 transitions. [2022-11-02 21:09:52,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:09:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 573 transitions. [2022-11-02 21:09:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 21:09:52,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:52,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:52,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:09:53,184 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:09:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2022-11-02 21:09:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:09:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317017579] [2022-11-02 21:09:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:09:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:09:53,186 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:09:53,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 21:09:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:09:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:53,442 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:09:53,442 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 21:09:53,648 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:09:53,649 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 21:09:53,949 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 14 treesize of output 20 [2022-11-02 21:09:53,994 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 14 treesize of output 20 [2022-11-02 21:09:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:09:54,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:54,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:09:54,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317017579] [2022-11-02 21:09:54,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317017579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1224946768] [2022-11-02 21:09:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:54,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:09:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:09:54,211 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:09:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-02 21:09:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:54,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:09:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:54,474 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 9 treesize of output 3 [2022-11-02 21:09:54,573 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:09:54,573 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 21:09:54,825 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:09:54,826 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 21:09:55,228 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 14 treesize of output 18 [2022-11-02 21:09:55,470 INFO L356 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-02 21:09:55,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-11-02 21:09:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:09:55,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:55,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1224946768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:55,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:55,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2022-11-02 21:09:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433316722] [2022-11-02 21:09:55,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:55,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:09:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:09:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:09:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:09:55,951 INFO L87 Difference]: Start difference. First operand 444 states and 573 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:09:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:59,965 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-11-02 21:09:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:09:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2022-11-02 21:09:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:59,967 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:09:59,967 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 21:09:59,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=138, Invalid=413, Unknown=1, NotChecked=0, Total=552 [2022-11-02 21:09:59,968 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 14 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:59,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1885 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 780 Invalid, 0 Unknown, 299 Unchecked, 1.9s Time] [2022-11-02 21:09:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 21:09:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-02 21:09:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7324414715719063) internal successors, (518), 414 states have internal predecessors, (518), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:09:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 583 transitions. [2022-11-02 21:09:59,979 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 583 transitions. Word has length 32 [2022-11-02 21:09:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:59,980 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 583 transitions. [2022-11-02 21:09:59,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:09:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 583 transitions. [2022-11-02 21:09:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 21:09:59,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:59,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:59,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-02 21:10:00,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:00,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:10:00,393 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2022-11-02 21:10:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:00,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624502069] [2022-11-02 21:10:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:00,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:00,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:00,395 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:00,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 21:10:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:10:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:02,736 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 21:10:13,037 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:10:13,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 21:10:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:10:13,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:14,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624502069] [2022-11-02 21:10:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624502069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354052385] [2022-11-02 21:10:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:10:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:10:14,239 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:10:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-02 21:10:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 21:10:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:14,482 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 9 treesize of output 3 [2022-11-02 21:10:14,663 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:10:14,664 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 21:10:14,679 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 21:10:14,868 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:10:14,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 21:10:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:10:15,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [354052385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:15,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:10:15,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2022-11-02 21:10:15,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632764932] [2022-11-02 21:10:15,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:10:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:10:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=154, Unknown=6, NotChecked=0, Total=210 [2022-11-02 21:10:15,831 INFO L87 Difference]: Start difference. First operand 454 states and 583 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 21:10:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:25,643 INFO L93 Difference]: Finished difference Result 454 states and 582 transitions. [2022-11-02 21:10:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:10:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-02 21:10:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:25,646 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:10:25,646 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 21:10:25,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=123, Invalid=373, Unknown=10, NotChecked=0, Total=506 [2022-11-02 21:10:25,647 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 14 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:25,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1536 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 557 Unchecked, 1.4s Time] [2022-11-02 21:10:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 21:10:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-02 21:10:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 414 states have internal predecessors, (517), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:10:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 582 transitions. [2022-11-02 21:10:25,658 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 582 transitions. Word has length 32 [2022-11-02 21:10:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:25,659 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 582 transitions. [2022-11-02 21:10:25,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 21:10:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 582 transitions. [2022-11-02 21:10:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 21:10:25,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:25,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 21:10:25,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:25,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:26,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:10:26,071 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash 139156185, now seen corresponding path program 1 times [2022-11-02 21:10:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:26,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555758918] [2022-11-02 21:10:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:26,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:26,073 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:26,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 21:10:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:10:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:10:26,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:10:26,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:26,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555758918] [2022-11-02 21:10:26,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555758918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:10:26,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:10:26,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:10:26,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520150199] [2022-11-02 21:10:26,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:10:26,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:10:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:10:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:10:26,216 INFO L87 Difference]: Start difference. First operand 454 states and 582 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:10:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:26,298 INFO L93 Difference]: Finished difference Result 479 states and 608 transitions. [2022-11-02 21:10:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:10:26,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-02 21:10:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:26,301 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:10:26,301 INFO L226 Difference]: Without dead ends: 479 [2022-11-02 21:10:26,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:10:26,302 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 245 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:26,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1232 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:10:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-02 21:10:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 448. [2022-11-02 21:10:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 293 states have (on average 1.7406143344709897) internal successors, (510), 408 states have internal predecessors, (510), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:10:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 575 transitions. [2022-11-02 21:10:26,314 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 575 transitions. Word has length 32 [2022-11-02 21:10:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:26,314 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 575 transitions. [2022-11-02 21:10:26,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:10:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 575 transitions. [2022-11-02 21:10:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:10:26,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:26,315 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:10:26,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-02 21:10:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:10:26,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2022-11-02 21:10:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157771480] [2022-11-02 21:10:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:26,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:26,529 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:26,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 21:10:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:26,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:10:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:10:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:10:26,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:26,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157771480] [2022-11-02 21:10:26,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157771480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:26,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:10:26,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:10:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499463567] [2022-11-02 21:10:26,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:10:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:10:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:10:26,748 INFO L87 Difference]: Start difference. First operand 448 states and 575 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:10:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:26,828 INFO L93 Difference]: Finished difference Result 447 states and 574 transitions. [2022-11-02 21:10:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:10:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-02 21:10:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:26,831 INFO L225 Difference]: With dead ends: 447 [2022-11-02 21:10:26,831 INFO L226 Difference]: Without dead ends: 447 [2022-11-02 21:10:26,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:10:26,832 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 241 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:26,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1053 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:10:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-02 21:10:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2022-11-02 21:10:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 293 states have (on average 1.7372013651877134) internal successors, (509), 407 states have internal predecessors, (509), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:10:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 574 transitions. [2022-11-02 21:10:26,843 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 574 transitions. Word has length 33 [2022-11-02 21:10:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:26,843 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 574 transitions. [2022-11-02 21:10:26,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:10:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 574 transitions. [2022-11-02 21:10:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:10:26,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:26,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:10:26,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:27,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:10:27,056 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263217, now seen corresponding path program 1 times [2022-11-02 21:10:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249304150] [2022-11-02 21:10:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:27,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:27,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:27,059 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:27,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-02 21:10:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:10:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:10:27,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:10:27,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249304150] [2022-11-02 21:10:27,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249304150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:10:27,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:10:27,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:10:27,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532287288] [2022-11-02 21:10:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:10:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:10:27,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:10:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:10:27,269 INFO L87 Difference]: Start difference. First operand 447 states and 574 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:10:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:27,350 INFO L93 Difference]: Finished difference Result 407 states and 451 transitions. [2022-11-02 21:10:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:10:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-02 21:10:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:27,353 INFO L225 Difference]: With dead ends: 407 [2022-11-02 21:10:27,353 INFO L226 Difference]: Without dead ends: 407 [2022-11-02 21:10:27,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:10:27,354 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 49 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:27,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1438 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:10:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-02 21:10:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 358. [2022-11-02 21:10:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 215 states have (on average 1.6744186046511629) internal successors, (360), 329 states have internal predecessors, (360), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-02 21:10:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2022-11-02 21:10:27,362 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 33 [2022-11-02 21:10:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:27,362 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2022-11-02 21:10:27,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:10:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2022-11-02 21:10:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:10:27,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:27,363 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:27,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:10:27,576 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2022-11-02 21:10:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979176546] [2022-11-02 21:10:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:27,577 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:27,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 21:10:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:27,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:10:27,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:27,805 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:10:27,805 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 21:10:29,896 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 21:10:29,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:10:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:10:29,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:10:30,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:30,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979176546] [2022-11-02 21:10:30,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979176546] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:30,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:10:30,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 21:10:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444285512] [2022-11-02 21:10:30,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:10:30,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:10:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:10:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2022-11-02 21:10:30,334 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:10:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:30,738 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2022-11-02 21:10:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:10:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-02 21:10:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:30,741 INFO L225 Difference]: With dead ends: 362 [2022-11-02 21:10:30,741 INFO L226 Difference]: Without dead ends: 362 [2022-11-02 21:10:30,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2022-11-02 21:10:30,742 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 22 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:30,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 702 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2022-11-02 21:10:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-02 21:10:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-11-02 21:10:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 215 states have (on average 1.669767441860465) internal successors, (359), 328 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-02 21:10:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 399 transitions. [2022-11-02 21:10:30,751 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 399 transitions. Word has length 33 [2022-11-02 21:10:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:30,752 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 399 transitions. [2022-11-02 21:10:30,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:10:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 399 transitions. [2022-11-02 21:10:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:10:30,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:30,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:30,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:30,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:10:30,967 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2022-11-02 21:10:30,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:30,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508995330] [2022-11-02 21:10:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:30,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:30,969 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-02 21:10:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:10:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:31,131 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 21:10:31,145 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 21:10:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:33,408 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 21:10:33,426 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:10:33,426 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 21:10:33,666 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:10:33,667 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 21:10:33,681 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 21:10:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:35,845 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 21:10:35,865 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:10:35,865 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 21:10:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:10:35,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:38,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:38,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508995330] [2022-11-02 21:10:38,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508995330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:38,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189851974] [2022-11-02 21:10:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:10:38,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:10:38,310 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:10:38,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-02 21:10:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 21:10:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:38,583 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 21:10:38,595 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 21:10:38,763 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:10:38,763 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 21:10:38,773 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 21:10:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:38,998 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 21:10:39,037 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:10:39,038 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 21:10:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:41,164 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 21:10:41,180 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:10:41,180 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 21:10:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:10:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:41,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189851974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:41,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:10:41,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2022-11-02 21:10:41,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029394499] [2022-11-02 21:10:41,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:41,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:10:41,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:10:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2022-11-02 21:10:41,578 INFO L87 Difference]: Start difference. First operand 357 states and 399 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:10:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:48,532 INFO L93 Difference]: Finished difference Result 610 states and 683 transitions. [2022-11-02 21:10:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:10:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-11-02 21:10:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:48,536 INFO L225 Difference]: With dead ends: 610 [2022-11-02 21:10:48,536 INFO L226 Difference]: Without dead ends: 610 [2022-11-02 21:10:48,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=44, Invalid=194, Unknown=2, NotChecked=0, Total=240 [2022-11-02 21:10:48,537 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:48,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1734 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1652 Invalid, 0 Unknown, 269 Unchecked, 4.7s Time] [2022-11-02 21:10:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-11-02 21:10:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 356. [2022-11-02 21:10:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 215 states have (on average 1.6604651162790698) internal successors, (357), 327 states have internal predecessors, (357), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-02 21:10:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2022-11-02 21:10:48,559 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 33 [2022-11-02 21:10:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:48,559 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2022-11-02 21:10:48,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:10:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2022-11-02 21:10:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:10:48,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:48,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:10:48,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:48,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:10:48,974 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2022-11-02 21:10:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090692917] [2022-11-02 21:10:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:48,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:48,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:48,977 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:48,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-02 21:10:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:10:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:10:49,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:10:49,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090692917] [2022-11-02 21:10:49,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090692917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:49,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:10:49,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:10:49,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028075706] [2022-11-02 21:10:49,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:10:49,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:10:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:10:49,853 INFO L87 Difference]: Start difference. First operand 356 states and 397 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:10:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:50,259 INFO L93 Difference]: Finished difference Result 560 states and 625 transitions. [2022-11-02 21:10:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:10:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2022-11-02 21:10:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:50,263 INFO L225 Difference]: With dead ends: 560 [2022-11-02 21:10:50,263 INFO L226 Difference]: Without dead ends: 560 [2022-11-02 21:10:50,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:10:50,264 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 294 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:50,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2166 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 109 Unchecked, 0.4s Time] [2022-11-02 21:10:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-02 21:10:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 439. [2022-11-02 21:10:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 288 states have (on average 1.7083333333333333) internal successors, (492), 399 states have internal predecessors, (492), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:10:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 549 transitions. [2022-11-02 21:10:50,275 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 549 transitions. Word has length 34 [2022-11-02 21:10:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:50,276 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 549 transitions. [2022-11-02 21:10:50,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:10:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 549 transitions. [2022-11-02 21:10:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:10:50,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:50,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:50,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-02 21:10:50,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:10:50,490 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2022-11-02 21:10:50,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:50,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548574721] [2022-11-02 21:10:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:50,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:50,492 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:50,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-02 21:10:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:50,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:10:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:50,878 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:10:50,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:10:50,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 21:10:51,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:10:51,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:10:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:10:51,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:51,467 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-02 21:10:51,467 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 32 treesize of output 31 [2022-11-02 21:10:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:10:51,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:51,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548574721] [2022-11-02 21:10:51,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548574721] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:51,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:10:51,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-02 21:10:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327562675] [2022-11-02 21:10:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:10:51,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:10:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:10:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:10:51,813 INFO L87 Difference]: Start difference. First operand 439 states and 549 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:10:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:54,093 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-11-02 21:10:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:10:54,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-02 21:10:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:54,096 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:10:54,096 INFO L226 Difference]: Without dead ends: 479 [2022-11-02 21:10:54,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:10:54,096 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:54,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1718 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-02 21:10:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-02 21:10:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-11-02 21:10:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 290 states have (on average 1.706896551724138) internal successors, (495), 401 states have internal predecessors, (495), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:10:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 552 transitions. [2022-11-02 21:10:54,107 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 552 transitions. Word has length 34 [2022-11-02 21:10:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:54,107 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 552 transitions. [2022-11-02 21:10:54,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:10:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 552 transitions. [2022-11-02 21:10:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:10:54,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:54,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:54,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:10:54,331 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:10:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2022-11-02 21:10:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:10:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142199015] [2022-11-02 21:10:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:54,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:10:54,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:10:54,332 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:10:54,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-02 21:10:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:10:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:54,870 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:10:54,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:10:54,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 21:10:54,917 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:10:54,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:10:54,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 21:10:55,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:10:55,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:10:55,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:10:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:10:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:55,794 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:10:55,794 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 38 treesize of output 42 [2022-11-02 21:10:56,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-02 21:10:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:10:57,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:10:57,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142199015] [2022-11-02 21:10:57,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142199015] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:57,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:10:57,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-02 21:10:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86887988] [2022-11-02 21:10:57,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:10:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:10:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:10:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:10:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:10:57,182 INFO L87 Difference]: Start difference. First operand 441 states and 552 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:11:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:01,669 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-11-02 21:11:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:11:01,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-02 21:11:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:01,673 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:11:01,673 INFO L226 Difference]: Without dead ends: 479 [2022-11-02 21:11:01,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:11:01,673 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 117 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:01,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1499 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-02 21:11:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-02 21:11:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-11-02 21:11:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 290 states have (on average 1.703448275862069) internal successors, (494), 401 states have internal predecessors, (494), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 551 transitions. [2022-11-02 21:11:01,682 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 551 transitions. Word has length 34 [2022-11-02 21:11:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:01,683 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 551 transitions. [2022-11-02 21:11:01,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:11:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 551 transitions. [2022-11-02 21:11:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:11:01,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:01,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:11:01,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:01,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:01,896 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2022-11-02 21:11:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:01,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855547015] [2022-11-02 21:11:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:01,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:01,899 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:01,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-02 21:11:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:11:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:02,020 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 21:11:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:11:02,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:11:02,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855547015] [2022-11-02 21:11:02,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855547015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:02,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:02,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-02 21:11:02,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077242839] [2022-11-02 21:11:02,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:02,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:11:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:11:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:11:02,251 INFO L87 Difference]: Start difference. First operand 441 states and 551 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:11:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:03,244 INFO L93 Difference]: Finished difference Result 446 states and 557 transitions. [2022-11-02 21:11:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:11:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-11-02 21:11:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:03,248 INFO L225 Difference]: With dead ends: 446 [2022-11-02 21:11:03,248 INFO L226 Difference]: Without dead ends: 446 [2022-11-02 21:11:03,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:11:03,249 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 0 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:03,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1159 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 158 Unchecked, 1.0s Time] [2022-11-02 21:11:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-02 21:11:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-11-02 21:11:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6962457337883958) internal successors, (497), 404 states have internal predecessors, (497), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 554 transitions. [2022-11-02 21:11:03,259 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 554 transitions. Word has length 35 [2022-11-02 21:11:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:03,259 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 554 transitions. [2022-11-02 21:11:03,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:11:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 554 transitions. [2022-11-02 21:11:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:11:03,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:03,261 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 21:11:03,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:03,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:03,475 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:03,475 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2022-11-02 21:11:03,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:03,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084942929] [2022-11-02 21:11:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:03,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:03,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:03,482 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:03,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-02 21:11:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:03,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:11:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:11:03,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:11:03,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:03,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084942929] [2022-11-02 21:11:03,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084942929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:03,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:03,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:11:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094865929] [2022-11-02 21:11:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:03,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:11:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:11:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:03,648 INFO L87 Difference]: Start difference. First operand 444 states and 554 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:11:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:03,720 INFO L93 Difference]: Finished difference Result 488 states and 600 transitions. [2022-11-02 21:11:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:11:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-02 21:11:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:03,723 INFO L225 Difference]: With dead ends: 488 [2022-11-02 21:11:03,723 INFO L226 Difference]: Without dead ends: 488 [2022-11-02 21:11:03,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:03,724 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 238 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:03,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1261 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-02 21:11:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 442. [2022-11-02 21:11:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 291 states have (on average 1.697594501718213) internal successors, (494), 402 states have internal predecessors, (494), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 551 transitions. [2022-11-02 21:11:03,731 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 551 transitions. Word has length 35 [2022-11-02 21:11:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:03,731 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 551 transitions. [2022-11-02 21:11:03,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:11:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 551 transitions. [2022-11-02 21:11:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:11:03,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:03,732 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 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 21:11:03,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:03,932 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2022-11-02 21:11:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846490559] [2022-11-02 21:11:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:03,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:03,934 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:03,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-02 21:11:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:11:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:11:04,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:11:04,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846490559] [2022-11-02 21:11:04,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846490559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:04,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:04,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:11:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533881698] [2022-11-02 21:11:04,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:04,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:11:04,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:11:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:11:04,723 INFO L87 Difference]: Start difference. First operand 442 states and 551 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:11:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:04,970 INFO L93 Difference]: Finished difference Result 564 states and 629 transitions. [2022-11-02 21:11:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:11:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2022-11-02 21:11:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:04,974 INFO L225 Difference]: With dead ends: 564 [2022-11-02 21:11:04,974 INFO L226 Difference]: Without dead ends: 564 [2022-11-02 21:11:04,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:11:04,975 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 305 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:04,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 2039 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-11-02 21:11:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-02 21:11:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 444. [2022-11-02 21:11:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6928327645051195) internal successors, (496), 404 states have internal predecessors, (496), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 553 transitions. [2022-11-02 21:11:04,984 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 553 transitions. Word has length 37 [2022-11-02 21:11:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:04,985 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 553 transitions. [2022-11-02 21:11:04,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:11:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 553 transitions. [2022-11-02 21:11:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:11:04,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:04,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:04,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:05,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:05,198 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2022-11-02 21:11:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:05,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858147618] [2022-11-02 21:11:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:05,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:05,200 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-02 21:11:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:11:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:11:05,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:11:05,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:05,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858147618] [2022-11-02 21:11:05,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858147618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:05,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:05,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:11:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542387852] [2022-11-02 21:11:05,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:05,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:11:05,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:11:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:11:05,389 INFO L87 Difference]: Start difference. First operand 444 states and 553 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:11:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:06,043 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2022-11-02 21:11:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:11:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-02 21:11:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:06,046 INFO L225 Difference]: With dead ends: 462 [2022-11-02 21:11:06,047 INFO L226 Difference]: Without dead ends: 462 [2022-11-02 21:11:06,047 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 21:11:06,047 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:06,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 738 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:11:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-02 21:11:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 445. [2022-11-02 21:11:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 295 states have (on average 1.6915254237288135) internal successors, (499), 405 states have internal predecessors, (499), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 556 transitions. [2022-11-02 21:11:06,054 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 556 transitions. Word has length 37 [2022-11-02 21:11:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:06,055 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 556 transitions. [2022-11-02 21:11:06,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:11:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 556 transitions. [2022-11-02 21:11:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:11:06,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:06,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:06,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:06,269 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2022-11-02 21:11:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:06,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597847512] [2022-11-02 21:11:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:06,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:06,271 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:06,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-02 21:11:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:11:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:06,704 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:11:06,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:11:06,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 21:11:06,755 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:11:06,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:11:06,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 21:11:07,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:11:07,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:11:07,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 21:11:07,289 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:11:07,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 21:11:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:07,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:07,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-02 21:11:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:11:08,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:08,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597847512] [2022-11-02 21:11:08,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597847512] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:08,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:11:08,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-11-02 21:11:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977418005] [2022-11-02 21:11:08,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:08,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:11:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:11:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:11:08,072 INFO L87 Difference]: Start difference. First operand 445 states and 556 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:11:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:09,861 INFO L93 Difference]: Finished difference Result 451 states and 561 transitions. [2022-11-02 21:11:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:11:09,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-02 21:11:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:09,864 INFO L225 Difference]: With dead ends: 451 [2022-11-02 21:11:09,864 INFO L226 Difference]: Without dead ends: 451 [2022-11-02 21:11:09,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:11:09,865 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 30 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:09,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1939 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 21:11:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-02 21:11:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2022-11-02 21:11:09,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 297 states have (on average 1.6868686868686869) internal successors, (501), 407 states have internal predecessors, (501), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2022-11-02 21:11:09,872 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 37 [2022-11-02 21:11:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:09,872 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2022-11-02 21:11:09,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:11:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2022-11-02 21:11:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:11:09,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:09,874 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 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 21:11:09,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-02 21:11:10,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:10,091 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2022-11-02 21:11:10,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978327169] [2022-11-02 21:11:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:10,093 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-02 21:11:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:11:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:10,234 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 21:11:10,332 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:11:10,333 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 21:11:10,460 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 14 treesize of output 20 [2022-11-02 21:11:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:10,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:10,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-02 21:11:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:10,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978327169] [2022-11-02 21:11:10,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978327169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:10,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:10,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-11-02 21:11:10,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921502879] [2022-11-02 21:11:10,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:10,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:11:10,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:11:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:11:10,801 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:11:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:13,231 INFO L93 Difference]: Finished difference Result 454 states and 565 transitions. [2022-11-02 21:11:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:11:13,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-11-02 21:11:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:13,235 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:11:13,235 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 21:11:13,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:11:13,235 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 294 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:13,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1814 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 858 Invalid, 0 Unknown, 129 Unchecked, 2.4s Time] [2022-11-02 21:11:13,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 21:11:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 448. [2022-11-02 21:11:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 298 states have (on average 1.6845637583892616) internal successors, (502), 408 states have internal predecessors, (502), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:11:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 559 transitions. [2022-11-02 21:11:13,242 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 559 transitions. Word has length 38 [2022-11-02 21:11:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:13,243 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 559 transitions. [2022-11-02 21:11:13,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:11:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 559 transitions. [2022-11-02 21:11:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:11:13,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:13,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:13,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:13,444 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2022-11-02 21:11:13,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:13,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538207521] [2022-11-02 21:11:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:13,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:13,446 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:13,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-02 21:11:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:11:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:11:16,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:18,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538207521] [2022-11-02 21:11:18,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538207521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451598095] [2022-11-02 21:11:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:18,729 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:11:18,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:11:18,731 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:11:18,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-02 21:11:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:19,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:11:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:11:36,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:41,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-02 21:11:43,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451598095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:43,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:43,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2022-11-02 21:11:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465929054] [2022-11-02 21:11:43,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:11:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:11:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=784, Unknown=10, NotChecked=0, Total=930 [2022-11-02 21:11:43,888 INFO L87 Difference]: Start difference. First operand 448 states and 559 transitions. Second operand has 21 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:11:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:45,516 INFO L93 Difference]: Finished difference Result 453 states and 564 transitions. [2022-11-02 21:11:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:11:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-11-02 21:11:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:45,519 INFO L225 Difference]: With dead ends: 453 [2022-11-02 21:11:45,519 INFO L226 Difference]: Without dead ends: 434 [2022-11-02 21:11:45,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=145, Invalid=901, Unknown=10, NotChecked=0, Total=1056 [2022-11-02 21:11:45,520 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 62 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1221 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:45,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 2403 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 396 Invalid, 0 Unknown, 1221 Unchecked, 1.5s Time] [2022-11-02 21:11:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-02 21:11:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-11-02 21:11:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 283 states have (on average 1.7173144876325088) internal successors, (486), 393 states have internal predecessors, (486), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 21:11:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2022-11-02 21:11:45,526 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 39 [2022-11-02 21:11:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:45,527 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2022-11-02 21:11:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:11:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2022-11-02 21:11:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:11:45,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:45,528 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-11-02 21:11:45,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:45,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:45,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:11:45,931 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2022-11-02 21:11:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:45,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825060211] [2022-11-02 21:11:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:45,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:45,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:45,932 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:45,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-02 21:11:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:11:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:11:46,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:11:46,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825060211] [2022-11-02 21:11:46,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825060211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:46,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:46,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:11:46,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050240579] [2022-11-02 21:11:46,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:11:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:11:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:46,162 INFO L87 Difference]: Start difference. First operand 432 states and 542 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:11:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:46,237 INFO L93 Difference]: Finished difference Result 431 states and 541 transitions. [2022-11-02 21:11:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:11:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-02 21:11:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:46,240 INFO L225 Difference]: With dead ends: 431 [2022-11-02 21:11:46,240 INFO L226 Difference]: Without dead ends: 431 [2022-11-02 21:11:46,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:46,240 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:46,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1042 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-02 21:11:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-11-02 21:11:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 283 states have (on average 1.7137809187279152) internal successors, (485), 392 states have internal predecessors, (485), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 21:11:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 541 transitions. [2022-11-02 21:11:46,261 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 541 transitions. Word has length 41 [2022-11-02 21:11:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:46,264 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 541 transitions. [2022-11-02 21:11:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:11:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 541 transitions. [2022-11-02 21:11:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:11:46,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:46,265 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 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 21:11:46,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:46,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:46,477 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2022-11-02 21:11:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:46,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599635915] [2022-11-02 21:11:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:46,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:46,479 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:46,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-02 21:11:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:11:46,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:46,697 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 21:11:46,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:11:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:11:46,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:11:46,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599635915] [2022-11-02 21:11:46,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599635915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:46,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:46,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:11:46,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60353597] [2022-11-02 21:11:46,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:46,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:11:46,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:11:46,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:11:46,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:46,713 INFO L87 Difference]: Start difference. First operand 431 states and 541 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:11:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:47,710 INFO L93 Difference]: Finished difference Result 485 states and 556 transitions. [2022-11-02 21:11:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:11:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-02 21:11:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:47,713 INFO L225 Difference]: With dead ends: 485 [2022-11-02 21:11:47,713 INFO L226 Difference]: Without dead ends: 485 [2022-11-02 21:11:47,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:47,714 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 161 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:47,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 867 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 353 Invalid, 0 Unknown, 233 Unchecked, 1.0s Time] [2022-11-02 21:11:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-02 21:11:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 430. [2022-11-02 21:11:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 283 states have (on average 1.7102473498233215) internal successors, (484), 391 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 21:11:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2022-11-02 21:11:47,722 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 41 [2022-11-02 21:11:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:47,722 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2022-11-02 21:11:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:11:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2022-11-02 21:11:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:11:47,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:47,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 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 21:11:47,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-02 21:11:47,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:11:47,936 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:11:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2022-11-02 21:11:47,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:11:47,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230071322] [2022-11-02 21:11:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:47,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:11:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:11:47,937 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:11:47,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-02 21:11:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:11:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:11:48,348 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 14 treesize of output 16 [2022-11-02 21:11:48,363 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:11:48,364 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 21:11:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:11:48,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:50,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:11:50,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230071322] [2022-11-02 21:11:50,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230071322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [325515010] [2022-11-02 21:11:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:50,874 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:11:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:11:50,876 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:11:50,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fbc97d-c459-44fd-a119-36eb17a938ff/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-02 21:11:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 21:11:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:51,229 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 21:11:51,237 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 21:11:51,516 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:11:51,517 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 21:11:51,524 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 21:11:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:11:51,767 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 21:11:51,786 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:11:51,786 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 21:12:00,078 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:12:00,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 21:12:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:12:00,402 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-02 21:12:00,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2022-11-02 21:12:00,415 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:12:00,416 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 21:12:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:12:00,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:02,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [325515010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:02,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:12:02,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 20 [2022-11-02 21:12:02,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596957699] [2022-11-02 21:12:02,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:02,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:12:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:12:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:12:02,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=424, Unknown=5, NotChecked=0, Total=506 [2022-11-02 21:12:02,703 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10)